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In a hypothesis test with hypotheses Ho: μ ≥ 80 and H1: μ < 80 and...

In a hypothesis test with hypotheses Ho: μ ≥ 80 and H1: μ < 80 and , a random sample of 105 elements selected from the population produced a mean of 74.6. Assume that σ= 23.3, and that the test is to be made at the 5% significance level.

-What is the critical value of z? -1.96, 1.645, 1.96 or -1.645

-What is the value of the test statistic, z, rounded to three decimal places?

-What is the p-value for this hypothesis test, rounded to four decimal places?

-Should you reject or fail to reject the null hypothesis in this test?

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