Answer Happy

Question 35 1 pts An air conditioning repair company has developed a regression model for predicting the time it will take to perform a repair. The estimated regression equation is: y-hat = 1.86 + 0.29(x1) + 1.10(x2) - 0.61(x3) where: y = Repair time (hours) X1 = Months since last maintenance service X2 = 0 if repair is mechanical; X2 = 1 if repair is electrical X3 = 0 if repair is done by Bob; x3 = 1 if done by Dave Referring to the regression equation above, the correct interpretation of b3 is: Bob should perform mechanical repairs and Dave should perform electrical repairs. Dave is expected to take 61% less time than Bob to perform a repair. OOOO Repair time is expected to be 0.61 hours less if Dave does the repair. Dave can perform 1.1 repairs in the time it takes Bob to perform 1.0 repairs.