The standard deviation of the sample values in Exercise 1 is 1.3 hours. What is the variance
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The standard deviation of the sample values in Exercise 1 is 1.3 hours. What is the variance (including units)?
Exercise 1
As part of the National Health and Nutrition Examination Survey, subjects were asked how long they slept the preceding night, and the following times (hours) were reported:
8, 7, 5, 7, 4, 7, 6, 7, 8, 8, 8, 6.
Find the mean.
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