A researcher conducts a study to investigate the influence of the amount of noise in the environment on the number of errors a person makes. The following means were obtained. What conclusion should be drawn from this experiment?

A researcher conducts a study to investigate the influence of the amount of noise in the environment on the number of errors a person makes. The following...

An experimenter investigated the ability to concentrate as a function of eye color. Eye color was classified as having either, brown eye, or other eye color. which type of graph should the experimenter use to display the results?

An experimenter investigated the ability to concentrate as a function of eye color. Eye color was classified as having either, brown eye, or other eye...

When we graph results from an experiment where the independent variable is on a nominal scale, which type of graph is appropriate

When we graph results from an experiment where the independent variable is on a nominal scale, which type of graph is appropriate A. line graph B....

On any graph a horizontal line of data points indicates that

On any graph a horizontal line of data points indicates that A. the Y scores are changing as the X scores change, and there is a relationship present. B....

When we graph results from an Experiment, a line graph is appropriate when

When we graph results from an Experiment, a line graph is appropriate when A. The independent variable is interval or ratio B. The independent variable...

When we graph the results of an experiment, the Y axis indicates the

When we graph the results of an experiment, the Y axis indicates the A. measure of central tendency we have used for the dependent variable. B. Raw...

When deciding which type of graph (bar, line, histogram, etc.) is appropriate, we consider the characteristics of the

When deciding which type of graph (bar, line, histogram, etc.) is appropriate, we consider the characteristics of the A. Variability of the distribution B....

In a graph of the relationship between the level of nose in a environment and the number of errors a person makes, the ____ is on the X axis and the ____ is on the Y axis.

In a graph of the relationship between the level of nose in a environment and the number of errors a person makes, the ____ is on the X axis and the...

A researcher has conducted an experiment in which the independent variable is room temperature. Two conditions (a hot room and a cold room) were used. The dependent variable was the length of time required to complete a jigsaw puzzle. What is the best way to state the there is a relationship?

A researcher has conducted an experiment in which the independent variable is room temperature. Two conditions (a hot room and a cold room) were used....

When deciding which type of measure of central tendency is appropriate, we consider the scale of measurement used to measure the.

When deciding which type of measure of central tendency is appropriate, we consider the scale of measurement used to measure the. A. variability of...

The population mean is estimated by

The population mean is estimated by A. calculation the mean of as many scores as we can get from the population. B. calculation the mean of a random...

When it is impossible to obtain all the scores in a depopulation, the best estimate of the population mean is the

When it is impossible to obtain all the scores in a depopulation, the best estimate of the population mean is the A. population median. B. sample...

μ is the symbol for the

μ is the symbol for the A. population median. B. population mode. C. population mean. D. sample mean. Answer: population mean...

Five students took a personality test. Their deviation scores were -4 +3 +1 -2 +2. Assuming that these scores form a normal distribution, which of the following orders represents their ranking in terms if frequency, from highest to lowest?

Five students took a personality test. Their deviation scores were -4 +3 +1 -2 +2. Assuming that these scores form a normal distribution, which of the...

Five students took a personality test. Their deviation scores were -4 +3 +1 -2 +2. Assuming that these scores form a normal distribution, which score(s) would have the highest frequency?

Five students took a personality test. Their deviation scores were -4 +3 +1 -2 +2. Assuming that these scores form a normal distribution, which score(s)...

Five students took a personality test. Their deviation scores were -4 +3 +1 -2 +2. Assuming that these scores form a normal distribution, which deviation represents the highest raw score?

Five students took a personality test. Their deviation scores were -4 +3 +1 -2 +2. Assuming that these scores form a normal distribution, which deviation...

With respect to a graph of a frequency distribution, a positive deviation score

With respect to a graph of a frequency distribution, a positive deviation score A. will be located to the right of the mean. B. will be located to...

A deviation score is more informative than a raw score because it

A deviation score is more informative than a raw score because it A. describes the shape of the distribution. B. has a greater numeric value. C.....

When the mean is used to predict scores, a deviation (x - x̄) indicates

When the mean is used to predict scores, a deviation (x - x̄) indicates A. the sample is representative of the population. B. the difference between...

For the following set of scores, what is (are) (x - x̄)? 7,8,10,10,11,12,13,13,15

For the following set of scores,what is (are) (x - x̄)?7,8,10,10,11,12,13,13,15 A. 4,3,2,1,0,-1,-2,-2,-4 B. -4,-3,-1,-1,0,1,2,2,3, C. 4,3,1,1,0,1,2,2,4 D....

When using the mean to predict scores, error is represented by.

When using the mean to predict scores, error is represented by. A. the deviation of the median from the mean. B. a statistic obtained from a nonrandom...

The equipment failed to record the reaction time for one trial in an experiment. The reaction times (in milliseconds)) for the other trials were 505, 630, 490, 650, and 560. What is the best guess for the missing value?

The equipment failed to record the reaction time for one trial in an experiment. The reaction times (in milliseconds)) for the other trials were 505,...

The best predictor of an individual score in a sample of scores is the

The best predictor of an individual score in a sample of scores is the A. Sum of the deviations of the scores from the mean. B. score minus the mean. C....

A score's deviation conveys two pieces of information about the score's location: the number indicates _____, and the sign indicates _____.

A score's deviation conveys two pieces of information about the score's location: the number indicates _____, and the sign indicates _____. A. The...

The sum of the deviations around the mean always equals

The sum of the deviations around the mean always equals A. 1. B. The mean. C. The sum of the total scores. D. 0. Answer: ...

A deviation score of -3 indicates that the raw score is

A deviation score of -3 indicates that the raw score is A. Greater than the mean. B. greater than the median. C. equal to the mean. D. Less than the...

The mean is used most often in behavioral research because researchers tend to

The mean is used most often in behavioral research because researchers tend to A. Measure variables that have interval or ratio scores, and the scores...

What happens to the mean of a distribution if every score is divided by 10?

What happens to the mean of a distribution if every score is divided by 10? A. its value is divided by 10. B. its value is multiplied by 10. C. its...

When we refer to a score's deviation, we are referring to

When we refer to a score's deviation, we are referring to A. how far it is from other scores. B. how far it is from the mean. C. how close it is to...

When a distribution's mode > median > mean, it is said to be

When a distribution's mode > median > mean, it is said to be A. positively skewed. B. negatively skewed C. symmetrical D. bimodal. Answer: negatively...

The distribution of weights of men in the American population is not symmetrical. Most weights are bunched together at the lower end of the distribution. As weights increase, there are fewer and fewer men with these weights. how would you describe the relationship between the mean, the median, and the mode in this distribution?

The distribution of weights of men in the American population is not symmetrical. Most weights are bunched together at the lower end of the distribution....

The mean is inappropriate measure of central tendency when the distribution is severely skewed because

The mean is inappropriate measure of central tendency when the distribution is severely skewed because A. it is not the mathematical center of a skewed...

In a skewed distribution the mathematical center is

In a skewed distribution the mathematical center is A. the median, which is the point around which most of the scores tend to be located. B. the mode,...

An experimenter investigated the ability to concentrate as a function of crowding. Concentration was measured as the amount of time it took the participant to complete a word puzzle. How should the experimenter summarize the scores on the dependent variable?

An experimenter investigated the ability to concentrate as a function of crowding. Concentration was measured as the amount of time it took the participant...

When a distributions mode = median = mean, it is said to be

When a distributions mode = median = mean, it is said to be A. positively skewed. B. negatively skewed. C. symmetrical. D. bimodal. Answer:&nbs...

The mean is the preferred measure of central tendency when

The mean is the preferred measure of central tendency when A. the scale of measurement is interval. B. the scale of measurement is ordinal, interval,...

Which measure of central tendency is appropriate if the shape of the distribution is symmetrical and the measurement scale is interval or ratio?

Which measure of central tendency is appropriate if the shape of the distribution is symmetrical and the measurement scale is interval or ratio? A....

Find the mean of the scores in the following frequency distribution. (S=Score)

Find the mean of the scores in the following frequency distribution.(S=Score) S | f 9 | 2 8 | 4 7 | 8 6 | 6 5 | 4 4 | 3 3 | 2 A. 8 B. 7 C. 6.21 D....

Find the mean of the following data set. 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Find the mean of the following data set.8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7 A. 5 B. 4 C. 5.24 D. 7 Answer: 5.2...

To obtain the mean, we would

To obtain the mean, we would A. count all the scores and divide by the total number of scores. B. add all the scores and divide by the sum of all...

The mean is defined as

The mean is defined as A. the most frequently occurring score. B. the mathematical center of the distribution. C. the smallest deviation from the...

Which measure of central tendency should be an academic counselor use to describe a students rank order in his/her classes?

Which measure of central tendency should be an academic counselor use to describe a students rank order in his/her classes? A. the mean. B. the Median C....

Find the median of the scores in the allowing frequency distribution.

Find the median of the scores in the allowing frequency distribution. (S=Score) S | f 9 | 2 8 | 4 7 | 8 6 | 6 5 | 4 4 | 3 3 | 2 A. 8 B. 7 C. 6.21 D....

Find the median of the following data set. 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Find the median of the following data set.8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7 A. 5 B. 4 C. 5.24 D. 7 Answer: ...

Why is the median unaffected by extreme scores occurring in only one tail of the distribution.

Why is the median unaffected by extreme scores occurring in only one tail of the distribution. A. because the median does not take into account the...

The median is the preferred measure of central tendency when

The median is the preferred measure of central tendency when A. the scale of measurement is nominal. B. the scale of measurement is ordinal. C. the...

Which measure of central tendency is appropriate if the shape of the distribution is severely skewed.

Which measure of central tendency is appropriate if the shape of the distribution is severely skewed. A. the mode. B. the median. C. the mean. D....

The median is defined as

The median is defined as A. the mostly frequently occurring score. B. the mathematical center of the distribution. C. the smallest deviation from...

Which measure of central tendency should a researcher use to describe the sex of participants in a study?

Which measure of central tendency should a researcher use to describe the sex of participants in a study? A. the mean. B. the median. C. the mode. D....

Why shouldn't the mode be used with the following set of scores? 2,5,3,3,4,2,4,5,1,1

Why shouldn't the mode be used with the following set of scores?2,5,3,3,4,2,4,5,1,1 A. the data are obviously not nominal. B. there is no mode. C....

In which of the following sets of data would the mode be inappropriate?

In which of the following sets of data would the mode be inappropriate? A. 3,4,5,5,5,6,7 B. 3,4,5,6,7 C. 3,4,4,4,5,5,6,7 D. 3,4,5,5,6,7 Answer:...

The mode is the appropriate measure of central tendency when the scale of measurement is.

The mode is the appropriate measure of central tendency when the scale of measurement is. A. nominal. B. ordinal. C. interval. D. ratio. Answer...

How would you describe the following set of scores. 2,2,3,3,3,4,4,5,6,7,7,8,8,8,8,9,9

How would you describe the following set of scores.2,2,3,3,3,4,4,5,6,7,7,8,8,8,8,9,9 A. negatively skewed. B. normally distributed. C. positively skewed. D....

The mode is defined as

The mode is defined as A. the most frequently occurring score. B. the mathematical center of the distribution. C. the smallest deviation from the...

Find the mode of the scores in the following frequency distribution. (S=Score)

Find the mode of the scores in the following frequency distribution.(S=Score) S | f 9 | 2 8 | 4 7 | 8 6 | 6 5 | 4 4 | 3 3 | 2 A. 8 B. 6 C. 7 D. ...

Find the mode of the following data set: 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Find the mode of the following data set:8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7 A. 5. B. 4. C. 5.24. D 7 Answer: 4...

In order to decide which measure of central tendency is appropriate you must first determine

In order to decide which measure of central tendency is appropriate you must first determine A. the appropriate graph to use and the independent variable. B....

With respect to other scores in a distribution, measures of central tendency

With respect to other scores in a distribution, measures of central tendency A. are all around the other scores. B. are the points around which most...

Measures of central tendency are measures of

Measures of central tendency are measures of A. Distance. B. Location. C. Deviation. D. Extremes. Answer: Location...

Adding numbers is an important procedure in statistics. Instead of saying "add up all of these scores" we use the symbol

Adding numbers is an important procedure in statistics. Instead of saying "add up all of these scores" we use the symbol A. K. B. X. C. Σ. D. Y. ...

Which scale of measurement is being used if assigning numbers based on different professional affiliation (e.g., counselors, social workers, psychologists, psychiatrists)?

Which scale of measurement is being used if assigning numbers based on different professional affiliation (e.g., counselors, social workers, psychologists,...

An individual being tested for a gifted program scores a 132 on the Cognitive Ability Test (CogAT), which has a mean of 100 and a standard deviation of 16. There is a .40 correlation between the CogAT score and success as measured by GPA in the gifted program, which has a weighted mean of 4.3 with a SD of .2. Use the Standard Error of the Estimate (SEest) to predict where this students GPA will fall 68 percent of the time.

An individual being tested for a gifted program scores a 132 on the Cognitive Ability Test (CogAT), which has a mean of 100 and a standard deviation...

A test to measure psychotic tendencies was given to a group of 1,000 potential air force cadets who wished to work in nuclear silos. Any cadet who scored at or over a 64 would be eliminated. The mean of the test was 52 and the standard deviation was 12. Of the following scores, which is the highest z-score someone could receive and still be accepted to work in the silos?

A test to measure psychotic tendencies was given to a group of 1,000 potential air force cadets who wished to work in nuclear silos. Any cadet who scored...

Which of the following represents the best description of a DIQ?

Which of the following represents the best description of a DIQ? a. z(SD) + Mean (M = 15, SD = l00) b. z(Mean) + SD (M = 100, SD = 15) c. z(Mean)...

Which of the following is NOT always true?

Which of the following is NOT always true? a. All of these are true. b. If you know the z score, you can determine the standard deviation of the test. c....

Which association certifies counselors and social workers as forensic health evaluators?

Which association certifies counselors and social workers as forensic health evaluators? a. The National Board of Certified Counselors b. The American...

This act or law assures the privacy of client records, including testing records, and the sharing of such information.

This act or law assures the privacy of client records, including testing records, and the sharing of such information. a. Carl Perkins Act (PL 98-524) b....

This law assures the right of individuals to access their federal records, including test records. Most states have similar laws that assure the right to access of state records.

This law assures the right of individuals to access their federal records, including test records. Most states have similar laws that assure the right...

A counselor can break confidentiality in all EXCEPT which of the following?

A counselor can break confidentiality in all EXCEPT which of the following? a. For purposes of supervision b. If the client gives the counselor permission...

Relative to assessment, which of the following are NOT addressed in ethical codes?

Relative to assessment, which of the following are NOT addressed in ethical codes? a. Proper test administration b. The use of diagnosis in the assessment...

Why is diagnosis important in the assessment process?

Why is diagnosis important in the assessment process? a. All of these are reasons why diagnosis is important in the assessment process. b. It provides...

Professionals often use informal diagnostic labels to improve communications to each other. Which of the following is NOT one that you would typically see?

Professionals often use informal diagnostic labels to improve communications to each other. Which of the following is NOT one that you would typically...

Which of the following is true about subtypes in the DSM-5?

Which of the following is true about subtypes in the DSM-5? a. They help capture the severity of an illness. b. They are mutually exclusive - you...

In the DSM-IV-TR, which of the following axis was used to describe personality disorders?

In the DSM-IV-TR, which of the following axis was used to describe personality disorders? a. Axis II b. Axis III c. Axis I d. Axis V e. Axis IV Answer: a....

Which edition of the APA Diagnostic and Statistical Manual first introduced the concept of multi-axial diagnosis?

Which edition of the APA Diagnostic and Statistical Manual first introduced the concept of multi-axial diagnosis? a. DSM-III b. DSM-5 c. DSM-II d....

What is the range of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14?

What is the range of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14? a. 8.5 b. 11 c. 8 d. 9 e. 10 Answer: b. 1...

What is the median of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14?

What is the median of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14? a. 9 b. 9.5 c. 8 d. None of these e. 8.5 Answer: e. 8...

On a negatively skewed curve, which of the following statements is true?

On a negatively skewed curve, which of the following statements is true? a. The mean, median, and mode is the same. b. The mode is lower than the...

Which of the following is the best method for determining the percentile rank regarding a group of scores?

Which of the following is the best method for determining the percentile rank regarding a group of scores? a. Frequency polygon b. Histogram c. Frequency...

Jerome has scored a 10 on a test. How has he done?

Jerome has scored a 10 on a test. How has he done? a. We should ask Jerome how he thinks he has done. His thoughts about his score are part of what...

In neuropsychological assessment, an individual's scores are best compared against which of the following?

In neuropsychological assessment, an individual's scores are best compared against which of the following? a. A large normative sample based on U.S....

Which of the following is true about the Wechsler tests?

Which of the following is true about the Wechsler tests? a. The WISC-IV is a downward extension of the WAIS-IV, and the WPPSI-III is a downward extension...

Which is NOT one of Guilford's cognitive abilities?

Which is NOT one of Guilford's cognitive abilities? a. Operations, or the processes we use in understanding b. Contents, or what we use to perform...

Spearman's two factor approach included:

Spearman's two factor approach included: a. higher order and lower order intelligence. b. the process factors of assimilation and accommodation. c....

Which of the following is NOT a use of intelligence testing?

Which of the following is NOT a use of intelligence testing? a. To assist in determining giftedness b. Intelligence testing is used for all of these...

Practicality has to do with all EXCEPT which of the following?

Practicality has to do with all EXCEPT which of the following? a. Time b. Format and readability c. Cost d. Ease of administration, scoring, and interpretation e....

PL 94-142 and the IDEIA asserted:

PL 94-142 and the IDEIA asserted: a. accommodations must be made for individuals who are taking tests for employment and testing must be shown to...

All of the following are types of internal consistency reliability EXCEPT:

All of the following are types of internal consistency reliability EXCEPT: a. odd-even. b. parallel forms. c. All of these are types of internal consistency...

A test developer creates a new instrument to measure depression. He correlates this instrument with an existing test that measures anxiety. The test developer hopes to not find a high correlation, thus assuring the integrity of the construct he is measuring. This type of validity is called:

A test developer creates a new instrument to measure depression. He correlates this instrument with an existing test that measures anxiety. The test...

Which of the following is an example of negative correlation?

Which of the following is an example of negative correlation? a. Caloric intake and a person's weight b. All of these c. None of these d. Height and...

Which of the following tend to have the weakest reliability and validity?

Which of the following tend to have the weakest reliability and validity? a. Survey battery achievement tests b. Readiness tests c. K-12 cognitive...

Which cognitive ability test measures cognitive skills for children K-12?

Which cognitive ability test measures cognitive skills for children K-12? a. Metropolitan Readiness Test b. The Scholastic Aptitude Test c. Thematic...

Which is NOT a diagnostic test?

Which is NOT a diagnostic test? a. The Peabody Individual Achievement Test b. The Wide Range Achievement Test 4 (WRAT4) c. All of these are diagnostic...

Based on the text, which of the following survey battery achievement tests has been criticized for NOT measuring "higher order thinking?"

Based on the text, which of the following survey battery achievement tests has been criticized for NOT measuring "higher order thinking?" a. Metropolitan...

Which of the following is NOT a use of tests of educational ability?

Which of the following is NOT a use of tests of educational ability? a. To assist in career and occupational assessment b. To help determine if a...

What is the range of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14?

What is the range of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14? a. 8.5 b. 11 c. 8 d. 9 e. 10 Answer: b. ...

What is the median of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14?

What is the median of the following groups of scores: 4, 7, 8, 8, 9, 10, 12, and 14? a. 9 b. 9.5 c. 8 d. None of these e. 8.5 Answer: e. 8...

On a negatively skewed curve, which of the following statements is true?

On a negatively skewed curve, which of the following statements is true? a. The mean, median, and mode is the same. b. The mode is lower than the...

Which of the following is the best method for determining the percentile rank regarding a group of scores?

Which of the following is the best method for determining the percentile rank regarding a group of scores? a. Frequency polygon b. Histogram c. Frequency...

Jerome has scored a 10 on a test. How has he done?

Jerome has scored a 10 on a test. How has he done? a. We should ask Jerome how he thinks he has done. His thoughts about his score are part of what...

The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He uses a random number generator to pick 4 of the 23 aisles, and then asks all of the customers in those aisles whether they are comfortable.

What survey methodology is this? The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He uses a random...

The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He knows men and women may have different views, and also knows 60% of his customers are women. He asks a random 60 women and a random 40 men whether they are comfortable.

What survey methodology is this? The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He knows men and...

The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He uses a random number generator to select customers at random and asks them whether they are comfortable.

What survey methodology is this? The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He uses a random...

The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He surveys every 10th customer that comes into the store and asks them whether they are comfortable, yes or no.

What survey methodology is this? The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He surveys every...

The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He surveys every 10th customer after they leave and are getting into their cars whether they are warm enough.

What is wrong with this survey? The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He surveys every...

An amusement park opens a new roller coaster. It is so popular that people are waiting for up to 3 hours. The owners want to know how the visitors feel. They survey every 10th person in the line for the roller coaster, starting from a randomly selected individual.

What is wrong with this survey? An amusement park opens a new roller coaster. It is so popular that people are waiting for up to 3 hours. The owners...

Lycos wanted to know what people thought about medical marijuana. They posted a question on the Lycos Website on 18 June 2000: Should marijuana be legally available for medical purposes?

What is wrong with this survey? Lycos wanted to know what people thought about medical marijuana. They posted a question on the Lycos Website on 18...

Fruit spoilage sampling at QFC - 20 kinds of fruit - What is it called if you pick up fruit and sample every 10th fruit?

Fruit spoilage sampling at QFC - 20 kinds of fruit - What is it called if you pick up fruit and sample every 10th fruit? Answer: Systematic ...

Fruit spoilage sampling at QFC - 20 kinds of fruit 0 what is it called if you pick 5 of each of the 20 kinds of fruit?

Fruit spoilage sampling at QFC - 20 kinds of fruit 0 what is it called if you pick 5 of each of the 20 kinds of fruit? Answer: Stratified sa...

Fruit spoilage sampling at QFC - 20 kinds of fruit - what is it called if you pick 3 kinds of fruit at random and check all the fruit for spoilage?

Fruit spoilage sampling at QFC - 20 kinds of fruit - what is it called if you pick 3 kinds of fruit at random and check all the fruit for spoilage? Answer: Clustered...

Is standard deviation resistant or nonresistant to extreme observations? Explain.

Is standard deviation resistant or nonresistant to extreme observations? Explain. Answer: s, like the mean, is not resistant. Strong skewness or a...

When does standard deviation equal zero?

When does standard deviation equal zero? Answer: When there is no spread. This happens only when all observations have the same valu...

What is the relationship between variance and standard deviation?

What is the relationship between variance and standard deviation? Answer: Standard deviation s is the square root of the variance s-squared...

What does standard deviation measure? How do we calculate it?

What does standard deviation measure? How do we calculate it? Answer: It measures spread around the mean and should only be used when the mean...

How do we use the five-number summary to make a modified boxplot?

How do we use the five-number summary to make a modified boxplot? Answer: A modified boxplot is a graph of the 5-number summary, with outliers...

What is the five-number summary?

What is the five-number summary? Answer: The 5 # summary is Minimum, Q1, Median, Q3, Maximum...

How can we use IQR to determine outliers?

How can we use IQR to determine outliers? Answer: An observations is an outlier it if is more than 1.5*IQR above the third quartile of below...

What is the interquartile range?

What is the interquartile range? Answer: The distance between the first and third quartiles, Q3 - Q...

Explain how to calculate Q1 and Q3.

Explain how to calculate Q1 and Q3. Answer: 1) arrange the observations in increasing order and locate the median M in the list. 2) Q1 is the median...

In statistics, what is meant by spread?

In statistics, what is meant by spread? Answer: Spread is a way to measure the variability of the observations around the center. One of the...

Explain why the median is resistant to extreme observations, but the mean is nonresistant.

Explain why the median is resistant to extreme observations, but the mean is nonresistant. Answer: The median is resistant because it is only...

Explain how to calculate the median, M.

Explain how to calculate the median, M. Median M is the midpoint of a distribution, the number such that half the observations are smaller and the...

Explain how to calculate the mean, x.

Explain how to calculate the mean, x. Answer: To find the mean of a set of observations, add their values and divide by the number of observ...

In statistics, what is the most common measurement of center?

In statistics, what is the most common measurement of center? Answer: arithmetic average, or mea...

When is it useful to construct a time plot?

When is it useful to construct a time plot? Answer: For variables that are measured over time, such as the height of a growing child, seasonal...

What is the purpose of a back-to-back stemplot?

What is the purpose of a back-to-back stemplot? Answer: To compare the shapes of 2 distributions...

When is it advantageous to split stems on a stemplot?

When is it advantageous to split stems on a stemplot? Answer: When each stem has many leaves...

How is the stemplot of a distribution related to its histogram?

How is the stemplot of a distribution related to its histogram? Answer: A histogram is a shaded in stemplot - on the histogram we lose the individual...

If a distribution is symmetric, what does its histogram look like? Skewed Right? Skewed Left?

If a distribution is symmetric, what does its histogram look like? Skewed Right? Skewed Left? Answer: Symmetric = right and left sides are approximately...

Define outlier.

Define outlier. Answer: an individual observation that falls outside the overall pattern of the grap...

When setting a window for constructing a histogram on the TI-83: What is the significance of Xscl? How do you choose the values of Xmin and Xmax?

When setting a window for constructing a histogram on the TI-83: What is the significance of Xscl? How do you choose the values of Xmin and Xmax? Answer: Xscl...

What is meant by frequency in a histogram?

What is meant by frequency in a histogram? Answer: The frequency = the number of counts in each class...

When is it better to use a histogram rather than a dot plot?

When is it better to use a histogram rather than a dot plot? Answer: When you have many data values...

Define range.

Define range. Answer: the difference between the largest and smallest values of data distributio...

What is meant by a distribution? How do you describe the overall pattern of a distribution?

What is meant by a distribution? How do you describe the overall pattern of a distribution? Answer: The distribution of a variable tells us what...

When is it useful to use a bar chart? Or a pie chart?

When is it useful to use a bar chart? Or a pie chart? Answer: Bar charts and pie charts are both used to display categorical data. A pie chart...

What is the difference between a categorical variable and a quantitative variable?

What is the difference between a categorical variable and a quantitative variable? Answer: A categorical variable places an individual into one...

What is meant by exploratory data analysis?

What is meant by exploratory data analysis? Answer: Exploratory data analysis uses graphs and numerical summaries to describe the variables in...

In statistics, what is meant by a variable?

In statistics, what is meant by a variable? Answer: any characteristic of an individua...

In statistics, what is meant by individuals?

In statistics, what is meant by individuals? Answer: objects described by a set of dat...