Question: Forecasting with a Moving Average. For a given time series of sales, the training set consists of 50 months. The first 5 months data are

Forecasting with a Moving Average. For a given time series of sales, the training set consists of 50 months. The first 5 months’ data are shown below:

a. Compute the sales forecast for January 1999 based on a moving average with w = 4.

b. Compute the forecast error for the above forecast.

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