The sales (in millions of dollars) for a 15- month period are as follows. Month 1 2 3 4 5 Sales 470 1000 490 lm Sales 390 565 395 450 490 560 420 Month 9 10 11 12 13 14 15 485 525 550 530 6 7 00 a. Compare a three- month moving average forecast with an exponential smoothing forecast. Use a = 0.2 . Find MSE for both methods. . Which provides the better forecasts based on MSE? c. Find the forecast for the next month using the best forecast method.

The sales (in millions of dollars) for a 15- month period are as follows. Month 1 2 3 4 5 6 7 8Sales 470 1000 490 lm Sales 390 565 395 450 490 560 420 Month 9 10 11 12 13 14 15 479 1000 490 485 525 550 530 6 7 00

a. Compare a three- month moving average forecast with an exponential smoothing forecast. Use a = 0.2 . Find MSE for both methods.

. Which provides the better forecasts based on MSE?

c. Find the forecast for the next month using the best forecast method.