Find value of mean square error for forecasting technique


Problem:

What is the value of the mean square error (MSE) for the forecasting technique whose forecasts for four past periods and the subsequent actual values are given below?

Actual    129 134 138 142
Forecast 136 126 130 146

i) 16.75

ii) 48.25

iii) 10.50

iv) 21.25

v) 27.50

Solve the problem and show all work.

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Operation Management: Find value of mean square error for forecasting technique
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