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Consider the Following Data -Use Simple Exponential Smoothing with ? = 0

Question 126

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Consider the following data:
 Time  Demand 117221319423518616720818922102011151222\begin{array} { c c } \text { Time } & \text { Demand } \\1 & 17 \\2 & 21 \\3 & 19 \\4 & 23 \\5 & 18 \\6 & 16 \\7 & 20 \\8 & 18 \\9 & 22 \\10 & 20 \\11 & 15 \\12 & 22\end{array}
-Use simple exponential smoothing with ? = 0.2.Determine the value of the forecast error for time period 1.

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