Question: 12. A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to perform the required hypothesis test about the mean,

12. A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to perform the required hypothesis test about the mean, u, of the population from which the sample was drawn. Use the critical-value approach. Sample mean = 3.12 S = 0.59 n = 9 a = 0.01 Ho: H = 2.85 H1: H > 2.85 The test statistics is (Round to three decimal places) NOTE QUESTIONS 12-14 ARE RELATED)

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