Statistics Solutions

[Step-by-Step] . Suppose that 9 observations are drawn from a normal population whose standard deviation is 2. The observations are: 15, 9, 13, 11, 8, 12, 11,

Question: . Suppose that 9 observations are drawn from a normal population whose standard deviation is 2. The observations are: 15, 9, 13, 11, 8, 12, 11, 7, and 10. At the .05 significance level, test whether the mean of the population from which this sample was taken is significantly different from 10.

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