A regression analysis between height y (in cm) and age x (in years) of 2 to 10 years old boys yielded the least squares line y-hat = 87 + 6.5x. This implies that by each additional year height is expected to:
A) increase by 93.5cm.
B) increase by 6.5cm.
C) increase by 87cm.
D) decrease by 6.5cm.

Question

Quizplus · Accepted Answer

According to the least squares line, for each additional year of age (x), the height (y) is expected to increase by 6.5cm. Therefore, choice B is the correct answer.

A Regression Analysis Between Height Y (In Cm) and Age