You Are Given N = 8 Measurements: 13, 11, 15

You are given n = 8 measurements: 13, 11, 15, 16, 14, 14, 13, and 15.
Calculate the range.
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Calculate the sample mean.
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Calculate the sample variance.
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Calculate the standard deviation.
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Compare the range and the standard deviation. The range is approximately how many standard deviations?
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