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Estimate the least squares regression equation

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Question: Gym Outfitters sells and services exercise equipment such as treadmills, ellipticals, and stair climbers to gymnasiums and recreational centers. The company's management would like to determine if there is a relationship between the number of minutes required to complete a routine service call and the number of machines serviced. A random sample of 12 records revealed the following information concerning the number of machines serviced and the time (in minutes) to complete the routine service call:

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a. Estimate the least squares regression equation.

b. If a gymnasium had six machines, how many minutes should Gym Outfitters expect a routine service call to require?

c. Provide a 90% confidence interval for the average amount of time required to complete a routine service call when the number of machines being serviced is nine.

d. Provide a 90% prediction interval for the time required to complete a particular routine service call for a gymnasium that has seven machines.

Reference no: EM131655369

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