A researcher studying the relationship between the number of hours students spend studying and their score on an exam calculates the following regression equation: Y' = 4.07 + .21(X). In this example, .21 refers to ______.
A) the Y-intercept
B) the slope of the equation
C) exam scores
D) the number of hours spent studying

Question

Quizplus · Accepted Answer

In a regression equation, the coefficient of X represents the slope of the line. Therefore, in this equation, .21 represents the slope of the relationship between the number of hours spent studying and exam scores.

A Researcher Studying the Relationship Between the Number of Hours