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(Solved): 4.3. Refer to Copier maintenance Problem 1.20. a. Will b0 and b1 tend to err in the same dir ...



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4.3. Refer to Copier maintenance Problem 1.20. a. Will and tend to err in the same direction or in opposite directions here? Explain. b. Obtain Bonferroni joint confidence intervals for and , using a 95 percent family confdence coefficient. c. A consultant has suggested that should be 0 and 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, is the number of copiers serviced and is the total number of minutes spent by the service person. Assume that first-order regression model (1.1) is appropriate.


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