The average adult male in the united states weighs 185 pounds and the standard deviation is 31 pounds. as in most measurements of this kind, you can assume that male weight is distributed normally. although mr. smith has a medical problem that makes him weigh as much as he does, the judge in the case has ruled that the reason for mr. smith’s girth has no bearing on the case. the company that manufactures the seat says that the average load that its seats can handle before collapse is 450 pounds with a standard deviation of 8 pounds. again, it makes sense to assume a normal distribution. who is to blame here, if anyone?

1. the manager of collins import autos believes the number of cars sold in a day (q) depends on two factors: (1) the number of hours the dealership is open (h) and (2) the number of salespersons working that day (s). after collecting data for two months (53 days), the manager estimates the following log-linear model: q 4 equation 1 a. explain, how to transform the log-linear model into linear form that can be estimated using multiple regression analysis. the computer output for the multiple regression analysis is shown below: q4 table b. how do you interpret coefficients b and c? if the dealership increases the number of salespersons by 20%, what will be the percentage increase in daily sales? c. test the overall model for statistical significance at the 5% significance level. d. what percent of the total variation in daily auto sales is explained by this equation? what could you suggest to increase this percentage? e. test the intercept for statistical significance at the 5% level of significance. if h and s both equal 0, are sales expected to be 0? explain why or why not? f. test the estimated coefficient b for statistical significance. if the dealership decreases its hours of operation by 10%, what is the expected impact on daily sales?