Question: An operation analyst is forecasting this year's demand for one of his company's products based on the following historical data: (4 year ago Quantity sold

An operation analyst is forecasting this year's demand for one of his company's products based on the following historical data: (4 year ago Quantity sold was 1071), (3 year ago Quantity sold was 1107 ), (2 year ago Quantity sold was 1747 ) and the last year Quantity sold was 1946 . The previous trend line had predicted 1208 for three years ago, 1267 for two years ago and 1325 for last year. What was the mean squared error (MSE) for these forecasts?

400.67001

208747.33

22.84

0.23

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