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A random sample of 70 observations from a normally distributed population possesses a sample mean equal...

A random sample of 70 observations from a normally distributed population possesses a sample mean equal to 26.2 and a sample standard deviation equal to 4.1

Use rejection region to test the null hypothesis that the mean of the population is 28 against the alternative hypothesis, μ<28 use α = .1

Use p-value to tell the null hypothesis that the mean of the population is 28 against the alternative hypothesis that the mean of the population is 28 against the alternative hypothesis, μ ≠ 28 use  α = .1

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