A researcher studying the relationship between drivers' average speed (MPH) on the highway and number of accidents they have been involved in develops the following regression equation: Y' = 1.75 + .03(X). In this example, if a driver's average driving speed is 75 MPH, you would predict he or she would get into ______ accidents
A) .03
B) 1.75
C) 4
D) 75

Question

Quizplus · Accepted Answer

According to the regression equation, the predicted number of accidents is Y = 1.75 + 0.03(X). Substituting X = 75 (the driver's average speed) yields Y = 1.75 + 0.03(75) = 4.25 accidents. Therefore, the best choice is C.

A Researcher Studying the Relationship Between Drivers' Average Speed (MPH)