When interested in examining how one variable changes in relation to another,which of the following descriptive statistics would you want to use?

A) mean
B) variance
C) correlation
D) standard deviation

To examine how one variable changes in relation to another, we need to use correlation. Correlation measures the strength and direction of the linear relationship between two variables. Mean, variance, and standard deviation are useful for describing a single variable, but not for examining the relationship between two variables.