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Question: the following observations were drawn from a large population 22...

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The following observations were drawn from a large population.

22 18 25 28 19 20 24 26 19 26 27 22 23

25 25 18 20 26 18 26 27 24 20 19 18

a Test to determine if we can infer at the 10% significance level that the population mean is greater than 20.

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