(a) The Marino Company in Ventura County, southern California sells swimming pool equipment. The sales for swimming pool motors in southern California over the last 12 months is given in Table Q4(a). Forecast the demand from March to December of the current year using the following forecasting models. Use excel for the tabulation. (1) Three-month simple moving average; (i)Three-month weighted moving average. Use 0.7, 0.2, and 0.1 for the weights, with 0.7 for the most recent period, and 0.1 for the oldest period. (ii) Simple linear regression; (iv) Determine the MAD, and SE for all the models, and choose which model is most appropriate. Table Q4(a) Marino Company Sales of Swimming pool motors Quantity (units) 11,596 Month January February March 14,438 16,861 10,002 April May 15,106 June 17,941 July August September October 11,877 14,290 17,363 12,430 14,858 November December 16,833

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(a) The Marino Company in Ventura County, southern California sells swimming pool equipment. The
sales for swimming pool motors in southern California over the last 12 months is given in Table Q4(a).
Forecast the demand from March to December of the current year using the following forecasting
models. Use excel for the tabulation.
(1) Three-month simple moving average;
(i)Three-month weighted moving average. Use 0.7, 0.2, and 0.1 for the weights, with
0.7 for the most recent period, and 0.1 for the oldest period.
(ii) Simple linear regression;
(iv) Determine the MAD, and SE for all the models, and choose which model is most appropriate.
Table Q4(a) Marino Company Sales of
Swimming pool motors
Quantity (units)
11,596
Month
January
February
March
14,438
16,861
10,002
April
May
15,106
June
17,941
July
August
September
October
11,877
14,290
17,363
12,430
14,858
November
December
16,833
Transcribed Image Text:(a) The Marino Company in Ventura County, southern California sells swimming pool equipment. The sales for swimming pool motors in southern California over the last 12 months is given in Table Q4(a). Forecast the demand from March to December of the current year using the following forecasting models. Use excel for the tabulation. (1) Three-month simple moving average; (i)Three-month weighted moving average. Use 0.7, 0.2, and 0.1 for the weights, with 0.7 for the most recent period, and 0.1 for the oldest period. (ii) Simple linear regression; (iv) Determine the MAD, and SE for all the models, and choose which model is most appropriate. Table Q4(a) Marino Company Sales of Swimming pool motors Quantity (units) 11,596 Month January February March 14,438 16,861 10,002 April May 15,106 June 17,941 July August September October 11,877 14,290 17,363 12,430 14,858 November December 16,833
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