Introduction to Econometrics 3rd Edition by James Stock, Mark Watson

تمرين 15

Suppose that a random sample of 200 twenty-year-old men is selected from a population and that these men's height and weight are recorded. A regression of weight on height yields

where Weight is measured in pounds and Height is measured in inches.
a. What is the regression's weight prediction for someone who is 70 in. tall 65 in. tall 74 in. tall
b. A man has a late growth spurt and grows 1.5 in. over the course of a year. What is the regression's prediction for the increase hi this man's weight
c. Suppose that instead of measuring weight and height in pounds and inches these variables are measured in centimeters and kilograms. What are the regression estimates from this new centimeter-kilogram regression (Give all results, estimated coefficients, R 2 , and SER. )