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?

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A: Given data is x={23,29,11,13,28,22,27,25}sample size(n)=8

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A: Stem Leaf Plot: The represented is the stem leaf plot for the data.

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Q: Calculate the sample standard deviation of the data shown. Round to two decimal places. 21 15 25 17…

A: Given data set: 21, 15, 25, 17, 24, 30 Number of observations = 6

Q: Calculate standard deviation from the following data. Marks Frequency | 6 0-10 10-20 20-30 30-40…

A: Class Interval Frequency, f Midpoint, x fx x2 fx2 0-10 6 5 30 25 150 10-20 8 15 120 225 1800…

Q: 211 384 396 211 224 337 395 121 356 621 367 408 515 280 289 180 431 176 318 836 203 374 224 121 412…

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Q: Q2 : A: Find the standard deviation and variance of the following data classes 10- 13- 16- 19-22…

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Q: Find mean and standard deviation of the following data : Wages ()pol 20–30 30 40 40-50 50-60 70-80…

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A: X1 X2 X3 132 52 173 143 59 184 153 67 194 162 73 211 154 64 196 168 74 220 137 54 188…

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Q: A Calculate the mean deviation and its coefficient from the following data: Class AnFrequency…

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Q: The fotlowing sample data represents the age of 30 lottery winners. 24 26 27 32 39 40 43 44 46 47 49…

A: the lowest value = 24 and the highest value = 84 so the range= R= 84 - 24= 60  So using the formula…

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Q: The following data shows how many employees showed up to work every day for two weeks     12…

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Q: Q) Consider the following ungrouped data: 18    11    22    19    24    24    23    10    11    16…

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