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14 Monthly actual and forecast sales for smart phones in an electronic shop is shown below. Find the mean squared error (MSE) for this forecasting

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14 Monthly actual and forecast sales for smart phones in an electronic shop is shown below. Find the mean squared error (MSE) for this forecasting method: uit of Month 1 2 3 4 Actual 46 49 54 51 Forecast 40 38 41 43 [Enter up to 2 decimals in the answer]

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