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Use the t -distribution and the sample results to complete the test of the hypotheses. Use a 5% significance level. Assume the results come from
Use the t-distribution and the sample results to complete the test of the hypotheses. Use a 5% significance level. Assume the results come from a random sample, and if the sample size is small, assume the underlying distribution is relatively normal. Test H0:=15 vs Ha:>15 using the sample results x=17.2, s=6.4, with n=40.
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