A researcher wanted to see if there was a linear relationship between the length of a person's leg and the length of a person's arm. Suppose a regression analysis was run to predict the lengths of legs from the lengths of arms. What would it mean if the intercept were 6 and the slope of the regression line 1?
A)On average, legs are 1 inch longer than arms.
B)On average, arms are 1 inch longer than legs.
C)On average, legs are 6 inches longer than arms.
D)On average, arms are 6 inches longer than legs.

Question

Quizplus · Accepted Answer

The intercept of 6 indicates that when the arm length is 0, the predicted leg length is 6 inches. The slope of 1 means that for every 1-inch increase in arm length, the leg length increases by 1 inch. Therefore, on average, legs are 6 inches longer than arms.

A Researcher Wanted to See If There Was a Linear