Mathematics, 25.11.2021 07:40, mya1318
An online computer support company claims that their mean call-back time is less than 38 minutes. A random sample of 30 calls has a sample mean of 29 minutes and a standard deviation of 6.5 minutes. Calculate the test statistic for testing the company's claim. Assume that a simple random sample has been selected from a normally distributed population. Round to the nearest hundredth.
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An online computer support company claims that their mean call-back time is less than 38 minutes. A...
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