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Using the following data set, find the following summary statistics. 8, 10, 15, 7, 22, 31, 25, 15, 20, 11, 15, 9 Mean .

Using the following data set, find the following summary statistics. 8, 10, 15, 7, 22, 31, 25, 15, 20, 11, 15, 9 Mean . Median Mode . Range Variance Standard Deviation Calculate the z scores for 15 and 22.

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