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 1092), (3 year ago Quantity sold was 1238 ), (2 year ago Quantity sold was 1750 ) and the last year Quantity sold was 1905 . The previous trend line had predicted 1204 for three years ago, 1258 for two years ago and 1312 for last year.

What was the mean squared error (MSE) for these forecasts?

a. 373

b. 0.20999999

c. 20.66

d. 198289.67

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