The numerical value of the variance

The numerical value of the variance

a. is always larger than the numerical value of the standard deviation
b. is always smaller than the numerical value of the standard deviation
c. is negative if the mean is negative
d. can be larger or smaller than the numerical value of the standard deviation


Answer: d. can be larger or smaller than the numerical value of the standard deviation

The coefficient of correlation

The coefficient of correlation

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. cannot be larger than 1

The coefficient of correlation ranges between

The coefficient of correlation ranges between

a. 0 and 1
b. -1 and +1
c. minus infinity and plus infinity
d. 1 and 100


Answer: b. -1 and +1

A numerical measure of linear association between two variables is the

A numerical measure of linear association between two variables is the

a. variance
b. coefficient of variation
c. correlation coefficient
d. standard deviation


Answer: c. correlation coefficient