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A simple random sample of 70 customers is taken froma customer information file and the average...

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Basic Math

A simple random sample of 70 customers is taken froma customerinformation file and the average age is 36. The population standarddeviation o is unknown. Instead the sample standard deviation s isalso calculated from the sample and is found to be 4.5. 2. Test the hypothesis that the population mean age is greaterthan 33 using the critical value approach and a 0.05 level ofsignificance. а. Test the hypothesis that the population mean ageis less than 38 using the p- value approach and a 0.05 level ofsignificance. b. Test the hypothesis that the population mean ageis different from 32 using the p-value approach and a 0.05 level ofsignificance. с.

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