Question: A simple random sample of size n = 15 is drawn from a population that is normally distributed. The sample mean is found to be

 A simple random sample of size n = 15 is drawn

A simple random sample of size n = 15 is drawn from a population that is normally distributed. The sample mean is found to be x= 22.9 and the sample standard deviation is found to be s = 6.3. Determine if the population mean is different from 25 at the

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