Question: Suppose that the data of Exercise 5.2 represent monthly sales. (a) Calculate the minimum mean square error forecasts for quarterly sales for 1, 2, 3,

Suppose that the data of Exercise 5.2 represent monthly sales.

(a) Calculate the minimum mean square error forecasts for quarterly sales for 1, 2, 3, 4 quarters ahead, using the data up to ???? = 100.

(b) Calculate 80% probability limits for these forecasts.

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