Data on the amount of time spent studying and the exam score of 150 students at a high school were collected. You want to know if a student's exam score is linearly related to the amount of time spent on studying. Which of the following would you compute?
A) arithmetic mean
B) covariance
C) median
D) coefficient of variation

Question

Quizplus · Accepted Answer

To determine if a student's exam score is linearly related to the amount of time spent on studying, we would compute the covariance between the two variables. Covariance measures the degree to which two variables are related to each other in a linear manner. The arithmetic mean and median are measures of central tendency and do not directly measure the relationship between two variables. The coefficient of variation is a measure of relative variability and is not directly relevant in determining the linear relationship between two variables.

Data on the Amount of Time Spent Studying and the Exam