Suppose that a random sample of 200 twenty-year-old men is selected from a popul

Question

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 Weight-(-101.3982)+ 4.0188 x Height, R0.83, SER 10.4, where Weight is measured in pounds and Height is measured in inches. What is the regression's weight prediction for someone who is 68 inches tall? The regression's weight prediction for someone who is 68 inches tall is pounds. (Round your response to two decimal places.) A man has a late growth spurt and grows 1.5 inches over the course of a year. What is the regression's prediction for the increase in this man's weight? The regression's prediction for the increase in this man's weight is pounds. (Round your response to two decimal places.)

Explanation / Answer

ANSWER:

1) Regression weight prediction = -101.3982 + 4.0188 * height

height = 68 inches

Regression weight prediction of man with 68 inches of height = -101.3982 + 4.0188 * 68

Regression weight prediction of man with 68 inches of height = -101.3982 + 273.2784 = 171.8802 pounds

2) regression prediction for increase in man's height = 4.0188 * height

height = 1.5 inches

regression prediction for increase in man's height = 4.0188 * 1.5 = 6.0282 pounds

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