Which of the following statements best illustrates the concept of covariance?
A) "The population means are not all equal to each other."
B) "Students who score below the class mean on the midterm also score below the mean on the final exam."
C) "Not everyone is the same."
D) "People who differ in intelligence also differ in their personalities."

Question

Quizplus · Accepted Answer

Covariance refers to the relationship between two variables, where they tend to vary together. In this statement, the two variables are midterm and final exam scores, and the relationship is that students who score below the class mean on the midterm also score below the mean on the final exam. This illustrates the concept of covariance. The other options do not specifically refer to a relationship between two variables.

Which of the Following Statements Best Illustrates the Concept of Covariance