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Asked Nov 26, 2019

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Please help with #85

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**Introduction:**

The null and alternative hypotheses are as follows:

H0: *μ* ≥ 2.5 hours, vs. H1: *μ* < 2.5 hours.

When the population standard deviation is unknown and the sample standard deviation must be used in a test to determine whether the true population mean is equal to a given constant, then the *t*-test must be used.

The test statistic is of th...

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