Samuelson Inc. is a major book distributor that ships books throughout the United States. Samuelson's Shipping Department consists of a manager plus 10 other permanent positions-four supervisors and six loaders. The four supervisors and six loaders provide the minimum staff and frequently must be supplemented by additional workers during weeks when the volume of shipments is heavy. Thus the number of persons shipping the orders frequently averages over 30 per week-10 permanent plus 20 temporary workers. The temporary workers are hired through a local agency.

Required:
(1) Using Regression 1 based on data from a full year, calculate the number of temporary workers who should be hired for a forecast of 1,200 shipments.
(2) Which one of the two regressions appears to be better? Explain.
(3) Explain the circumstances under which this regression should be used in planning for temporary workers.
(4) Explain how the regression might be improved.

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Regression Regression 1 (Daily Data for 52 Weeks) 5.062 2 (Daily Data for 38 Weeks) 489 028 023 Standard error(s) of the estimate .. 2.012 432 Coefficient of determination (r 962 998