(a) What is the average BMI for a woman who averages 9500 steps per day? (b) If an observed BMI at x = 9.5 were 22.8, what is the residual? (c) Suppose that you want to use the estimated population regression line to examine the average BMI for a woman who averages 2000, 7000, 12,000, and 17,000 steps per day. Discuss the appropriateness of using the equation to predict BMI for each of these activity levels.

"jake’s roof repair has provided the following data concerning its costs: fixed cost per month cost per repair-hour wages and salaries $ 20,900 $ 15.00 parts and supplies $ 7.70 equipment depreciation $ 2,800 $ 0.35 truck operating expenses $ 5,720 $ 1.60 rent $ 4,690 administrative expenses $ 3,850 $ 0.50 for example, wages and salaries should be $20,900 plus $15.00 per repair-hour. the company expected to work 2,600 repair-hours in may, but actually worked 2,500 repair-hours. the company expects its sales to be $47.00 per repair-hour. required: compute the company’s activity variances for may."