(Solved): 4.3. Refer to Copier maintenance Problem 1.20. a. Will b0 and b1 tend to err in the same dir ...
4.3. Refer to Copier maintenance Problem 1.20. a. Will b0 and b1 tend to err in the same direction or in opposite directions here? Explain. b. Obtain Bonferroni joint confidence intervals for β0 and β1, using a 95 percent family confdence coefficient. c. A consultant has suggested that β0 should be 0 and β1 should equal 14.0. Do your joint confidence intervals in part (b) support this view?
*1.20. Copier maintenance. The Tri-City Office Equipment Corporation sells an imported copier on a franchise basis and performs preventive maintenance and repair service on this copier. The data below have been collected from 45 recent calls on users to perform routine preventive maintenance service; for each call, X is the number of copiers serviced and Y is the total number of minutes spent by the service person. Assume that first-order regression model (1.1) is appropriate.