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11-15. A simple random sample of 15 people from a certain population has a mean age of 25 with a standard deviation of 1t]. Can

11-15. A simple random sample of 15 people from a certain population has a mean age of 25 with a standard deviation of 1t]. Can we conclude that the mean age of the population is younger than 25? Let alpha : .[i5 STEPS SOLUTION

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