3. Test the claim that a population mean exceeds 40. You have a sample of 40...

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3. Test the claim that a population mean exceeds 40. You have a sample of 40 items for which the sample mean x 42 and sample standard deviation s- 7. Use significance level α 0.05.

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3. Test the claim that a population mean exceeds 40. You have a sample of 40...

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