One of the assumptions used when analyzing a simple truss is that the members are joined together by __________.Answer: Smooth p...
What will be the easiest way to determine the force reaction BZ ?
What will be the easiest way to determine the force reaction BZ ?Answer: Vector equation MA =...
A plate is supported by a ball-and-socket joint at A, a roller joint at B, and a cable at C. How many unknown support reactions are there in this problem?
A plate is supported by a ball-and-socket joint at A, a roller joint at B, and a cable at C. How many unknown support reactions are there in this problem?Answer: five...
When doing a 3-D problem analysis, you have ________ scalar equations of equilibrium.
When doing a 3-D problem analysis, you have ________ scalar equations of equilibrium.Answer:&nbs...
If a support prevents translation of a body, then the support exerts a ___________ on the body.
If a support prevents translation of a body, then the support exerts a ___________ on the body.Answer: Fo...
If a support prevents rotation of a body about an axis, then the support exerts a ________ on the body about that axis.
If a support prevents rotation of a body about an axis, then the support exerts a ________ on the body about that axis.Answer: Couple mom...
The three scalar equations, FX = FY = MO = 0, are ____ equations of equilibrium in two dimensions.
The three scalar equations, FX = FY = MO = 0, are ____ equations of equilibrium in two dimensions.Answer: The most commonly u...
The original force and couple system and an equivalent force-couple system have the same _____ effect on a body.
The original force and couple system and an equivalent force-couple system have the same _____ effect on a body.Answer: exter...
Internal forces are _________ shown on the free body diagram of a whole body.
Internal forces are _________ shown on the free body diagram of a whole body.Answer: Ne...
If a support prevents translation of a body, then the support exerts a ___________ on the body.
If a support prevents translation of a body, then the support exerts a ___________ on the body.Answer: Fo...
A general system of forces and couple moments acting on a rigid body can be reduced to a ___ .
A general system of forces and couple moments acting on a rigid body can be reduced to a ___ .Answer: single force and a single mom...
The moment of a couple is called a _________ vector.
The moment of a couple is called a _________ vector.Answer: f...
In statics, a couple is defined as __________ separated by a perpendicular distance.
In statics, a couple is defined as __________ separated by a perpendicular distance.Answer: two forces of equal magnitude acting in opposite dir...
If r = {1 i + 2 j} m and F = {10 i + 20 j + 30 k} N, then the moment of F about the y-axis is ____ N·m.
If r = {1 i + 2 j} m and F = {10 i + 20 j + 30 k} N, then the moment of F about the y-axis is ____ N·m.Answer: ...
The triple scalar product u • ( r F ) results in
The triple scalar product u • ( r F ) results inAnswer: a scalar quantity ( + or -...
When determining the moment of a force about a specified axis, the axis must be along _____________.
When determining the moment of a force about a specified axis, the axis must be along _____________.Answer: any line in 3-D sp...
If a particle has 3-D forces acting on it and is in static equilibrium, the components of the resultant force ( Fx, Fy, and Fz ) ___ .
If a particle has 3-D forces acting on it and is in static equilibrium, the components of the resultant force ( Fx, Fy, and Fz ) ___ .Answer: have...
If a force of magnitude F can be applied in four different 2-D configurations (P,Q,R, & S), select the cases resulting in the maximum and minimum torque values on the nut. (Max, Min).
If a force of magnitude F can be applied in four different 2-D configurations (P,Q,R, & S), select the cases resulting in the maximum and minimum...
For a frictionless pulley and cable, tensions in the cable (T1 and T2) are related as _____ .
For a frictionless pulley and cable, tensions in the cable (T1 and T2) are related as _____ .Answer: T1 =...
When a particle is in equilibrium, the sum of forces acting on it equals ___ .
When a particle is in equilibrium, the sum of forces acting on it equals ___ . Answer: Z...
If a dot product of two non-zero vectors equals -1, then the vectors must be ________ to each other.
If a dot product of two non-zero vectors equals -1, then the vectors must be ________ to each other.Answer: Collinear but pointing in the opposite...
If a dot product of two non-zero vectors is 0, then the two vectors must be _____________ to each other.
If a dot product of two non-zero vectors is 0, then the two vectors must be _____________ to each other.Answer: Perpendicu...
The dot product of two vectors results in a _________ quantity.
The dot product of two vectors results in a _________ quantity.Answer: sca...
The dot product of two vectors P and Q is defined as
The dot product of two vectors P and Q is defined asAnswer: P Q cos (the...
The height of a building, measured in feet, is an example of
The height of a building, measured in feet, is an example ofa. categorical datab. either categorical or quantitative datac. feet datad. quantitative dataAnswer: d....
The weight of a candy bar in ounces is an example of
The weight of a candy bar in ounces is an example ofa. categorical datab. either categorical or quantitative datac. weight datad. quantitative dataAnswer: d....
Which of the following variables use the ratio scale of measurement?
Which of the following variables use the ratio scale of measurement?a. social security numberb. temperaturec. genderd. incomeAnswer: d. inc...
Which scale of measurement can be either numeric or nonnumeric?
Which scale of measurement can be either numeric or nonnumeric?a. nominalb. ratioc. intervald. None of these alternatives is correct.Answer: a. ...
Which of the following is a scale of measurement?
Which of the following is a scale of measurement?a. ratiob. primalc. divisionald. remedialAnswer: a. ra...
Which of the following is not a scale of measurement?
Which of the following is not a scale of measurement?a. nominalb. ordinalc. intervald. primalAnswer: d. pri...
In a data set, the number of elements will always be the same as the number of
In a data set, the number of elements will always be the same as the number ofa. independent variablesb. observationsc. data pointsd. dependent variablesAnswer: b....
The scale of measurement that is simply a label for the purpose of identifying the attribute of an element is the
The scale of measurement that is simply a label for the purpose of identifying the attribute of an element is thea. ratio scaleb. nominal scalec. ordinal...
Since a sample is a subset of the population, the sample mean
Since a sample is a subset of the population, the sample meana. is always smaller than the mean of the populationb. is always larger than the mean of...
The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students at City College
The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students...
In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent
In a post office, the mailboxes are numbered from 1 to 4,500. These numbers representa. categorical datab. quantitative datac. either categorical or quantitative...
The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called
The process of analyzing sample data in order to draw conclusions about the characteristics of a population is calleda. Data and Statisticsb. statistical...
The Department of Transportation of a city has noted that on the average there are 17 accidents per day. The average number of accidents is an example of
The Department of Transportation of a city has noted that on the average there are 17 accidents per day. The average number of accidents is an example...
The owner of a factory regularly requests a graphical summary of all employees' salaries. The graphical summary of salaries is an example of
The owner of a factory regularly requests a graphical summary of all employees' salaries. The graphical summary of salaries is an example ofa. a sampleb....
A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 24 years. This is an example of
A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students...
Five hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The five hundred residents in this study is an example of a(n)
Five hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The five hundred residents in this...
In a sample of 400 students in a university, 80, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of
In a sample of 400 students in a university, 80, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of...
One hundred students from a large university were asked about their opinion on the new health care program. The 100 represents
One hundred students from a large university were asked about their opinion on the new health care program. The 100 representsa. a sampleb. a populationc....
A portion of the population selected to represent the population is called
A portion of the population selected to represent the population is calleda. statistical inferenceb. Data and Statisticsc. a censusd. a sampleAnswer: d....
The collection of all elements of interest in a particular study is
The collection of all elements of interest in a particular study isa. the populationb. the samplingc. statistical inferenced. Data and StatisticsAnswer: a....
Statistical inference
Statistical inferencea. refers to the process of drawing inferences about the sample based on the characteristics of the populationb. is the same as Data...
The summaries of data, which may be tabular, graphical, or numerical, are referred to as
The summaries of data, which may be tabular, graphical, or numerical, are referred to asa. inferential statisticsb. Data and Statisticsc. statistical...
Statistical studies in which researchers control variables of interest are
Statistical studies in which researchers control variables of interest area. experimental studiesb. control observational studiesc. non-experimental studiesd....
Statistical studies in which researchers do not control variables of interest are
Statistical studies in which researchers do not control variables of interest area. experimental studiesb. uncontrolled experimental studiesc. not of...
Data collected over several time periods are
Data collected over several time periods area. time series datab. time controlled datac. crossectional datad. time crossectional dataAnswer: a. time...
Data collected at the same, or approximately the same, point in time are
Data collected at the same, or approximately the same, point in time area. time series datab. approximate time series datac. crossectional datad. approximate...
Income is an example of
Income is an example ofa. categorical datab. either categorical or quantitative datac. dollar datad. quantitative dataAnswer: d. quantitative d...
Arithmetic operations are inappropriate for
Arithmetic operations are inappropriate fora. categorical datab. quantitative datac. both categorical and quantitative datad. large data setsAnswer: a....
For ease of data entry into a university database, 1 denotes that the student is an undergraduate and 2 indicates that the student is a graduate student. In this case data are
For ease of data entry into a university database, 1 denotes that the student is an undergraduate and 2 indicates that the student is a graduate student....
Temperature is an example of
Temperature is an example ofa. a categorical variableb. a quantitative variablec. either a quantitative or categorical variabled. neither a quantitative...
Social security numbers consist of numeric values. Therefore, social security is an example of
Social security numbers consist of numeric values. Therefore, social security is an example ofa. a quantitative variableb. either a quantitative or a...
Ordinary arithmetic operations are meaningful
Ordinary arithmetic operations are meaningfula. only with categorical datab. only with quantitative datac. either with quantitative or categorical datad....
Which of the following statements, do you think, can be a valid reason of the objection raised by some members of the Congress, against some of the questions in the form?
The 2000 census form asked 53 detailed questions, such as: "Do you have complete plumbing facilities in this house, apartment, or mobile home; hot and...
Your college or university has an institutional review board that screens all studies that use human subjects. Which of the following should be the duties of the board?
Your college or university has an institutional review board that screens all studies that use human subjects. Which of the following should be the duties...
In which of the circumstances below would you allow collecting personal information without the subjects' consent?
In which of the circumstances below would you allow collecting personal information without the subjects' consent?A.A social psychologist pretends to...
One of the most important nongovernment surveys in the United States is the General Social Survey. The GSS regularly monitors public opinion on a wide variety of political and social issues. Interviews are conducted in person in the subject's home. A subject's responses to GSS questions are:
One of the most important nongovernment surveys in the United States is the General Social Survey. The GSS regularly monitors public opinion on a wide...
Some people think that the law should require that all political poll results be made public. Otherwise, the possessors of poll results can use the information to their own advantage. They can act on the information, release only selected parts of it, or time the release for best effect. A candidate's organization replies that they are paying for the poll in order to gain information for their own use, not to amuse the public. Which of the following statements do you think is appropriate in reference to the scenario?
Some people think that the law should require that all political poll results be made public. Otherwise, the possessors of poll results can use the information...
Error committed by rejecting a true null hypothesis
Error committed by rejecting a true null hypothesisAnswer: Type I er...
Error committed by failing to reject a false null hypothesis
Error committed by failing to reject a false null hypothesisAnswer: Type II er...
The standard deviation of the distribution of sample means
The standard deviation of the distribution of sample meansAnswer: Standard error of the m...
The quotient of the frequency at which a given characteristic occurs in a sample and the number of items in the sample
The quotient of the frequency at which a given characteristic occurs in a sample and the number of items in the sampleAnswer: Sample proport...
If a null hypothesis is not rejected at the .05 level of significance, the p-value is bigger than 0.05
If a null hypothesis is not rejected at the .05 level of significance, the p-value is bigger than 0.05Answer: T...
The rejection and nonrejection regions are divided by a point called the critical value
The rejection and nonrejection regions are divided by a point called the critical valueAnswer: T...
When using the p-value to test hypotheses, the null hypothesis would be rejected if
When using the p-value to test hypotheses, the null hypothesis would be rejected ifAnswer: the p-value is less than the significance le...
The probability of getting a test statistic as extreme as the observed test statistic computed from the sample data under the assumption that the null hypothesis is true is called the
The probability of getting a test statistic as extreme as the observed test statistic computed from the sample data under the assumption that the null...
If the calculated test statistic falls in the rejection region, the statistical action is to
If the calculated test statistic falls in the rejection region, the statistical action is toAnswer: reject the null hypothe...
A hypothesis demonstrated in an indirect way using the hypothesis test. If the null hypothesis is rejected, this hypothesis is accepted.
A hypothesis demonstrated in an indirect way using the hypothesis test. If the null hypothesis is rejected, this hypothesis is accepted.Answer: Alternative...
A hypothesis is a claim or assumption about an unknown population parameter
A hypothesis is a claim or assumption about an unknown population parameterAnswer: Hypothe...
Hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error
Hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental errorAnswer: null...
Type II error is committed when
Type II error is committed whenAnswer: the null hypothesis is false and it is not rejec...
Type I error is committed when
Type I error is committed whenAnswer: the null hypothesis is true and is rejec...
Generally speaking, new hypotheses that business researchers want to "prove" are stated in the
Generally speaking, new hypotheses that business researchers want to "prove" are stated in theAnswer: alternate hypothe...
The probability of committing a Type I error is
The probability of committing a Type I error isAnswer: the level of significa...
A statistical hypotheses consists of two parts
A statistical hypotheses consists of two partsAnswer: a null hypothesis and an alternate hypothe...
Residents who own a house in a particular city were divided into 15 groups based on the location of their house. A random sample of ten residents from each of the 15 groups was selected to be interviewed. What type of sampling plan is being used?
Residents who own a house in a particular city were divided into 15 groups based on the location of their house. A random sample of ten residents from...
For which of the following sampling methods can the sampling distribution of the sample statistics generally be identified?
For which of the following sampling methods can the sampling distribution of the sample statistics generally be identified?a. cluster samplingb. simple...
A wildlife management organization is interested in estimating the number of moose in a particular region. Organization employees divide the region into ten sections and randomly select four sections to survey the number of moose present. What sampling method is being used?
A wildlife management organization is interested in estimating the number of moose in a particular region. Organization employees divide the region into...
A sample chosen by stratified random sampling involves:
A sample chosen by stratified random sampling involves:a. randomly selecting one of the first k elements in an ordered population, and then selecting...
A random sample of 150 individuals who purchased a computer was taken. The survey determined that 70 of the individuals purchased Brand D. Which of the following is an unbiased estimate of the population proportion of all computers purchased that are Brand D?
A random sample of 150 individuals who purchased a computer was taken. The survey determined that 70 of the individuals purchased Brand D. Which of the...
If a random sample of size n = 20 is taken from a normal distribution with a mean μ, which of the following would be an unbiased estimator for μ?
If a random sample of size n = 20 is taken from a normal distribution with a mean μ, which of the following would be an unbiased estimator for μ?a.p̂b....
Suppose candidate A for a town council seat receives 43% of the votes in an election. As voters leave the polls they are asked who they voted for. What is the probability that less than 40% of the 80 voters surveyed indicate they voted for candidate A? Assume an infinite population.
Suppose candidate A for a town council seat receives 43% of the votes in an election. As voters leave the polls they are asked who they voted for. What...
Suppose s random sample of 20 observations is taken from an infinite population. The sampling distribution of p̂ is
Suppose s random sample of 20 observations is taken from an infinite population. The sampling distribution of p̂ isa. not normal since n < 30b. approximately...
The proportion of students at a university who pass a biology class is p =.86. If 50 students are randomly selected, what is the probability that at least 75% of them have passed the class?
The proportion of students at a university who pass a biology class is p =.86. If 50 students are randomly selected, what is the probability that at least...
A population of size 320 has a proportion equal to .60 for the characteristic of interest. What are the mean and the standard deviation, respectively, of the sample proportion for samples of size 12?
A population of size 320 has a proportion equal to .60 for the characteristic of interest. What are the mean and the standard deviation, respectively,...
If the sample size is increased, the standard error of the sampling distribution of x̄ will
If the sample size is increased, the standard error of the sampling distribution of x̄ willa. It depends on the data being studied.b. remain the same.c....
Suppose the salaries of university professors are approximately normally distributed with a mean of $65,000 and a standard deviation of $7,000. If a random sample of size 25 is taken and the mean is calculated, what is the probability that the mean value will be between $62,500 and $64,000?
Suppose the salaries of university professors are approximately normally distributed with a mean of $65,000 and a standard deviation of $7,000. If a random...
A sample of 240 is selected from a finite population of 500. If the standard deviation of the population is 44, what is the standard error of the sample mean?
A sample of 240 is selected from a finite population of 500. If the standard deviation of the population is 44, what is the standard error of the sample...
When can the central limit theorem be used to approximate the sampling distribution of x̄ by a normal curve?
When can the central limit theorem be used to approximate the sampling distribution of x̄ by a normal curve?a. It can be used when the standard deviation...
Which of the following is an unbiased point estimator?
Which of the following is an unbiased point estimator?a. n is an unbiased estimator of x̄b. s is an unbiased estimator of sigmac. All of these choices...
The sample mean, x̄, obtained from repeated samples of the same size from a population is
The sample mean, x̄, obtained from repeated samples of the same size from a population isa. a random variable.b. always equal to 0.c. exactly equal to...
Given the sampling distribution of the sample mean shown here, which of the following values is a reasonable estimate for the population mean?
Given the sampling distribution of the sample mean shown here, which of the following values is a reasonable estimate for the population mean?(highest...
The sampling distribution describes the:
The sampling distribution describes the:a. sample size.b. long-run behavior of a statistic.c. short-term behavior of the population.d. population proportion.Answer: b....
Suppose 8 out of 26 cars that pass a radar station are exceeding the speed limit. If the population proportion of cars that exceed the speed limit is .42, what is the value of p̂?
Suppose 8 out of 26 cars that pass a radar station are exceeding the speed limit. If the population proportion of cars that exceed the speed limit is...
A university is interested in the average age of its students. A simple random sample of 30 students was selected. The following descriptive statistics for their ages were compted: x̄ =20.8 and s^2=8.4. What is a point estimate of the population standard deviation for age?
A university is interested in the average age of its students. A simple random sample of 30 students was selected. The following descriptive statistics...
What is a point estimate for μ, the mean test score for the population?
A simple random sample of 8 high school student's ACT scores gave the following data.27, 30, 20, 29, 28, 36, 34, 31What is a point estimate for μ, the...
A dealership is interested in the population proportion of new vehicle purchases that are gold in color. Which of the following represents the sample statistic of interest?
A dealership is interested in the population proportion of new vehicle purchases that are gold in color. Which of the following represents the sample...
If we select simple random samples of size 2 from the given data, what is the probability of any of the five employees being selected first?
Starting salaries of a sample of five management majors along with their genders are shown below.Employee|Salary($1000s)|M/F1 | 30 | F2 | 28 | M3 | 22...
A simple random sample of size 5 from an infinite population is to be selected. Each possible sample should have:
A simple random sample of size 5 from an infinite population is to be selected. Each possible sample should have:a. a probability of .2 of being selected.b....
When the selection of one element from the population influences the selection of another element, the sample:
When the selection of one element from the population influences the selection of another element, the sample:a. was selected using computer-generated...
The number of simple random samples of size 20 that can be selected from a finite population of size 25 is:
The number of simple random samples of size 20 that can be selected from a finite population of size 25 is:a. 53,130b. 1c. 20d. 120Answer: a. 53...
The symbol p typically represents a:
The symbol p typically represents a:a. mean.b. proportion.c. standard deviation.d. sample size.Answer: b. proporti...
The CEO of a large corporation is interested in the average salary of all managers for his large corporation. A sample of 500 managers found the average salary to be $56,500. Which of the following statements is correct?
The CEO of a large corporation is interested in the average salary of all managers for his large corporation. A sample of 500 managers found the average...
The population mean is represented by the symbol:
The population mean is represented by the symbol:a.x̄b. sigmac. Sd. μAnswer: d....
The time it takes to completely clean an office building follows an exponential distribution with a mean of 135 minutes. What is the probability of cleaning an office building in 135 minutes or less?
The time it takes to completely clean an office building follows an exponential distribution with a mean of 135 minutes. What is the probability of cleaning...
Which of the following distributions is not symmetric?
Which of the following distributions is not symmetric?a. Normalb. All of these choices distributions are symmetricc. Exponentiald. Standard normalAnswer: c....
Suppose that the lifetime of batteries in a flashlight is exponentially distributed with a mean of 35 hours. What is the probability that the batteries will last between 25 and 30 hours?
Suppose that the lifetime of batteries in a flashlight is exponentially distributed with a mean of 35 hours. What is the probability that the batteries...
What is the mean of x for the exponential distribution, f(x)=(1/2)e^-x/2, x ≥ 0?
What is the mean of x for the exponential distribution, f(x)=(1/2)e^-x/2, x ≥ 0?a. 1.36b. 0c. .5d. 2Answer: d....
The lodge at a ski resort has 50 suites. In the winter months, the occupancy rate for the suites is approximately 90%. What is the probability that 45 or fewer rooms are occupied on a given day?
The lodge at a ski resort has 50 suites. In the winter months, the occupancy rate for the suites is approximately 90%. What is the probability that 45...
When using the normal approximation to the binomial, what is the standard deviation for a binomial probability distribution with p =.3 and n = 145?
When using the normal approximation to the binomial, what is the standard deviation for a binomial probability distribution with p =.3 and n = 145?a....
The lodge at a ski resort has 50 suites. In the winter months, the occupancy rate for the suites is approximately 90%. What is the probability that at least 80% of the suites are occupied on a given day?
The lodge at a ski resort has 50 suites. In the winter months, the occupancy rate for the suites is approximately 90%. What is the probability that at...
Which of the following represents the mean of the normal distribution used to approximate a binomial distribution?
Which of the following represents the mean of the normal distribution used to approximate a binomial distribution?a. μ=√np(1-p)b. 0c. μ=npd. μ=n(1-p)Answer: c....
Given that z is a standard normal random variable, what is the value of z if the area to the right of z is 0.9370?
Given that z is a standard normal random variable, what is the value of z if the area to the right of z is 0.9370?a. 1.96b. - 1.53c. 1.50d. .8264Answer: b....
If the random variable X is distributed normally with a mean of 0 and a standard deviation of 1, which of the following probabilities is not correct?
If the random variable X is distributed normally with a mean of 0 and a standard deviation of 1, which of the following probabilities is not correct?a....
A small business owner determines that her revenue during the next year should be approximately normally distributed with a mean of $425,000 and a standard deviation of $130,000. What is the probability that her revenue will exceed $600,000?
A small business owner determines that her revenue during the next year should be approximately normally distributed with a mean of $425,000 and a standard...
Suppose a preliminary screening is given to prospective student athletes at a university to determine whether they would qualify for a scholarship. The scores are approximately normal with a mean of 85 and a standard deviation of 20. If the range of possible scores is 0 to 100, what percentage of students has a score less than 85?
Suppose a preliminary screening is given to prospective student athletes at a university to determine whether they would qualify for a scholarship. The...
The normal distribution is symmetric about:
The normal distribution is symmetric about:a. the standard deviation.b. 0c. the mean.d. 1Answer: c. the me...
What is the probability that the bottle will be filled between 63.90 and 64 ounces?
A production line fills 64 ounce bottles of juice uniformly according to the following probability density function.F(x)={4 for 63.85≤64.10}{0 elsewhere}What...
Consider the continuous random variable x, which has a uniform distribution over the interval from 110 to 150. The probability that x will take on a value between 120 and 125 is:
Consider the continuous random variable x, which has a uniform distribution over the interval from 110 to 150. The probability that x will take on a value...
Let x be a uniform random variable on the interval 1≤x≤6. What is the standard deviation of x?
Let x be a uniform random variable on the interval 1≤x≤6. What is the standard deviation of x?a. 1.44b. 2.08c. .2d. ...
Suppose the flight time between Atlanta and Salt Lake City is uniformly distributed on the interval from 220 to 250 minutes. The expected flight time (in minutes) is:
Suppose the flight time between Atlanta and Salt Lake City is uniformly distributed on the interval from 220 to 250 minutes. The expected flight time...
What is the P(10≤x≤30) for a uniform random variable defined on the interval 0 to 40?
What is the P(10≤x≤30) for a uniform random variable defined on the interval 0 to 40?a. .025b. .5c. .05d. 0Answer: b....
A local retailer received a shipment of 20 items that included 6 defective and 14 nondefective items. In the inspection of the shipment, a sample of 8 items will be selected and tested. The mean number of defective items is:
A local retailer received a shipment of 20 items that included 6 defective and 14 nondefective items. In the inspection of the shipment, a sample of 8...
Using a hypergeometric distribution with N = 6 and r = 2, what is the probability for n = 4 and x = 0?
Using a hypergeometric distribution with N = 6 and r = 2, what is the probability for n = 4 and x = 0?a. .0001b. .9333c. .6667d. .0667Answer: d....
A retailer received seven new items from the manufacturer. Four of the items were damaged in transit. The retailer sold three items to five customers. Which of the following probability distributions would be useful in this situation?
A retailer received seven new items from the manufacturer. Four of the items were damaged in transit. The retailer sold three items to five customers....
An air traffic controller has noted that it clears an average of 7 planes per hour for landing. What is the probability that during the next two hours exactly 15 planes will be cleared for landing?
An air traffic controller has noted that it clears an average of 7 planes per hour for landing. What is the probability that during the next two hours...
A manufacturer is interested in the number of flaws occurring in each 30 yards of material. The random variable representing the number of major flaws satisfies which of the following probability distributions?
A manufacturer is interested in the number of flaws occurring in each 30 yards of material. The random variable representing the number of major flaws...
The random variable x is the number of vehicles that pass through an intersection in a 30 minute interval. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number of occurrences in 30 minutes is 9. What is the expected value of the random variable x?
The random variable x is the number of vehicles that pass through an intersection in a 30 minute interval. It can be assumed that the probability of an...
Let x be a Poisson random variable with mean = 3. What is f(2)?
Let x be a Poisson random variable with mean = 3. What is f(2)?a. 1.732b. .1804c. .2240d. .4232Answer: c. .2...
Of the passengers on a 757 airliner, 40% are female. A random sample of 25 passengers is selected. What is the expected number of female passengers in the sample?
Of the passengers on a 757 airliner, 40% are female. A random sample of 25 passengers is selected. What is the expected number of female passengers in...
A binomial experiment is conducted in which 30 dishwashers are randomly selected from a production plant and tested to determine whether or not they function properly. Any specific dishwasher will work properly with a probability of p =.98. What is the random variable in this experiment?
A binomial experiment is conducted in which 30 dishwashers are randomly selected from a production plant and tested to determine whether or not they function...
Twelve percent of the customers of a bank overdraw their accounts at least once a month. A sample of eight customers is selected. What is the probability that exactly two customers in the sample will overdraw their account this month?
Twelve percent of the customers of a bank overdraw their accounts at least once a month. A sample of eight customers is selected. What is the probability...
Suppose a binomial random variable consists of 9 trials with a success of probability of .4. What are the mean and standard deviation for this binomial random variable?
Suppose a binomial random variable consists of 9 trials with a success of probability of .4. What are the mean and standard deviation for this binomial...
A production process produces 2% defective parts. A sample of nine parts from the production process is selected. What is the probability that the sample contains exactly two defective parts?
A production process produces 2% defective parts. A sample of nine parts from the production process is selected. What is the probability that the sample...
Suppose a random variable t has a probability distribution defined by f(t) = t/20 for t = 2, 4, 6, and 8. What is the expected value for t?
Suppose a random variable t has a probability distribution defined by f(t) = t/20 for t = 2, 4, 6, and 8. What is the expected value for t?a. 1.5b. 2c....
The variance is a weighted average of the:
The variance is a weighted average of the:a. squared deviations from the medianb. square root of the deviations from the meanc. squared deviations from...
Assume the number of customers who order a dessert with their meal on a given night at a local restaurant has the probability distribution given below.
Assume the number of customers who order a dessert with their meal on a given night at a local restaurant has the probability distribution given below.x...
The number of vehicle thefts in the parking lot of a shopping mall varies from month to month. Assume that the number of thefts(x) at the shopping mall has the following probability distribution.
The number of vehicle thefts in the parking lot of a shopping mall varies from month to month. Assume that the number of thefts(x) at the shopping mall...
A production manager has provided the following information about the probabilities of the number of faulty products produced per week.
A production manager has provided the following information about the probabilities of the number of faulty products produced per week.X | F(x)0 .161...
If a random variable can assume one of five outcomes and the distribution is uniform, what is the probability function for this random variable?
If a random variable can assume one of five outcomes and the distribution is uniform, what is the probability function for this random variable?a. f(x)...
Which of the following is not a required condition for a discrete probability function?
Which of the following is not a required condition for a discrete probability function?a. ∑f(x) = 1b. ∑f(x) ≥ 0 for all values of xc. ∑f(x) = 0d. All...
The probability function for the number of people in a randomly selected vehicle is given below. What is the probability that there are less than three people in a randomly selected vehicle?
The probability function for the number of people in a randomly selected vehicle is given below. What is the probability that there are less than three...
Which of the following could represent a discrete uniform probability function?
Which of the following could represent a discrete uniform probability function?a. f(x) = 5 n where n is the number of values the random variable can assumeb....
A pediatrician records the heights and ages of her patients over a one month period. The average height is recorded for each age and is an example of a:
A pediatrician records the heights and ages of her patients over a one month period. The average height is recorded for each age and is an example of...
The amount of time a patient must wait to be seen at a doctor's office is an example of:
The amount of time a patient must wait to be seen at a doctor's office is an example of:a. either a continuous or a discrete random variable, depending...
A continuous random variable may assume:
A continuous random variable may assume:a. only the positive integer values in an interval.b. only fractional values in an interval or collection of intervals.c....
Which of the following is a continuous random variable?
Which of the following is a continuous random variable?a. The number of goals scored in a hockey gameb. The number of correct answers on a multiple choice...
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