Copier maintenance. The Tri-City Office Equipment Corporationsells an imported copier on a franchise basis and performspreventive maintenance and repair service on this copier. The databelow have been collected from 45 recent calls on users to performroutine preventive maintenance service; for each call, X is thenumber of copiers serviced and Y is the total number of minutesspent by the service person. Assume that first-order regressionmodel (1.1) is appropriate. (a) Obtain the estimated regressionfunction. (b) Plot the estimated regression function and the data.How well does the estimated regression function fit the data? (c)Interpret b o in your estimated regression function. Does b oprovide any relevant information here? Explain. (d) Obtain a pointestimate of the mean service time when X = 5 copiers are serviced.Use R programming . The data set is 20 2 60 4 46 3 41 2 12 1 137 1068 5 89 5 4 1 32 2 144 9 156 10 93 6 36 3 72 4 100 8 105 7 131 8127 10 57 4 66 5 101 7 109 7 74 5 134 9 112 7 18 2 73 5 111 7 96 6123 8 90 5 20 2 28 2 3 1 57 4 86 5 132 9 112 7 27 1 131 9 34 2 27 261 4 77 5
