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Exponential smoothing is used to forecast automobile battery sales. A value of smoothing constant is examined, where = 0.6. Evaluate the accuracy of the smoothing

Exponential smoothing is used to forecast automobile battery sales. A value of smoothing constant is examined, where = 0.6. Evaluate the accuracy of the smoothing constant. (Assume the forecast for January was 22 batteries.) Actual sales are given below:

Month Actual Battery Sales Forecast

January 20 22

February 21

March 15

April 14

May 13

June 16

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