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Question: Direct Mailing Company sells computers & computer parts by mail. The company claims that at least 90% of all orders are mailed within 72 hours after they are received. The quality control department at the company often takes samples to check if this claim is valid. A recently taken sample of 150 orders showed that 129 of them were mailed within 72 hours. Do you think the company's claim is true? Use a=0.1 significance level.
Step [A] State the null & alternative hypotheses.Step [B] Make the appropriate test statistics & the rejection of your test.Step [C] Calculate the value of the test statistic.Step [D] Make a decisionStep [E] Find the p-value for the test of part a. What is your conclusion if α = 0.1?
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