A simple forecasting method for weekly sales of flash drives used by a localcomputer dealer is to form the average of the two most recent sales figures. Suppose sales for the drives for the past 12 weeks wereWeek:    1     2     3     4      5     6      7    8    9    10    11    12Sales:   86   75   72   83  132   65  110  90  67    92    98    73 What is the estimate of the standard deviation of forecast error obtained from the data given above?

Q: For the data set 2 20 11 26 10 5 6. 15 13 19 12 10 3 17 24 27 23 18 12 9. 26 31 10 The 67th…

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Q: Baseline 50 65 42 55 78 31 66 84 23 45 Test 53 64 45 51 80 29 65 86 21 47…

A: Determine the variance of the raw scores: Variance=∑x-μ2n-1=3472.910-1=385.8778

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A: WeekSales198021040311204105059606990710308126091240101100

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A: x (x-xbar)^2 3.98 0.388544 3.78 0.179211 2.95 0.165378 3.55 0.037378 3.44 0.006944 3.08…

Q: 나 88 100 76 112 124 -20 -1o 1o 20 -5 17 28 39 -20 -10 1o 20

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