A regression analysis between weight (y in pounds)and height (x in inches)resulted in the following least squares line: = 120 + 5x.This implies that if the height is increased by 1 inch,the weight is expected to:
A)increase by 1 pound.
B)decrease by 1 pound.
C)decrease by 120 pounds.
D)increase by 5 pounds.

Question

A regression analysis between weight (y in pounds)and height (x in inches)resulted in the following least squares line:  = 120 + 5x.This implies that if the height is increased by 1 inch,the weight is expected to:
A)increase by 1 pound. 
B)decrease by 1 pound. 
C)decrease by 120 pounds. 
D)increase by 5 pounds.

Quizplus · Accepted Answer

According to the least squares line, for every one inch increase in height (x), the weight (y) is expected to increase by 5 pounds. Therefore, if the height is increased by 1 inch, the weight is expected to increase by 5 pounds.

A Regression Analysis Between Weight (Y in Pounds)and Height (X