a.) Decrease
b.) Increase
c.) Stayed the same
d.) Disappeared
Answer: A
a.) can never be larger than the mean
b.) is always larger than the median
c.) is always larger than the mean
d.) None of these alternative is correct
Answer: D
a.) mode
b.) standard deviation
c.) range
d.) interquartile range
Answer: A
a.) is negative since all the numbers are negative
b.) must be at least zero
c.) cannot be computed since all the numbers are negative
d.) can be either negative or positive
Answer: B
a.) the median
b.) the mode
c.) the trimmed mean
d.) any of the above
Answer: C
a.) is the same as the coefficient of determination
b.) can be larger than 1
c.) cannot be larger than 1
d.) cannot be negative
Answer: C
a.) 0 and 1
b.) -1 and +1
c.) minus infinity and plus infinity
d.) 1 and 100
Answer: B
a.) variance
b.) coefficient of variation
c.) correlation coefficient
d.) standard deviation
Answer: C
a.) a positive variance of the x values
b.) a positive variance of the y values
c.) the standard deviation is positive
d.) positive relation between the independent and the dependent variables
Answer: D
a.) variance
b.) covariance
c.) standard deviation
d.) coefficient of variation
Answer: B
a.) the variance of the population
b.) the standard deviation of the sample
c.) the standard deviation of the population
d.) the variance of the sample
Answer: A
a.) the variance of the population
b.) the standard deviation of the sample
c.) the standard deviation of the population
d.) the variance of the sample
Answer: C
a.) always greater than zero
b.) always less than zero
c.) sometimes greater than and sometimes less than zero, depending on the data elements
d.) always equal to zero
Answer: D
a.) their standard deviations must also be equal
b.) their medians must also be equal
c.) their modes must also be equal
d.) None of these alternative is correct
Answer: D
a.) zero
b.) larger than the standard deviation
c.) negative
d.) smaller than the standard deviation
Answer: C
a.) is always smaller than the true value of the population variance
b.) is always larger than the true value of the population variance
c.) could be smaller, equal to, or larger than the true value of the population variance
d.) can never be zero
Answer: C
a.) larger than the variance
b.) zero
c.) negative
d.) smaller than the variance
Answer: C
a.) mean
b.) median
c.) mode
d.) variance
Answer: A
a.) range
b.) median
c.) mode
d.) mean
Answer: D
a.) the range
b.) the interquartile range
c.) the absolute value of the range
d.) the standard deviation
Answer: D
