I. The number of plumbing repair jobs performed by Augur’s Plumbing Service in each of the last five months is listed below.
Month Jobs
March 82
April 86
May 89
June 94
July 96
Show all calculations in answering the following questions.
a. Use the linear trend method to forecast jobs in August.
b. Use a weighted three-month moving average, with weights of .5, .3 and .2, to forecast August jobs.
c. Using the Mean Absolute Deviation for forecasts for May through July, explain which of these methods is likely to produce the most accurate forecast for August.