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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 10. 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 10. Can we conclude that the mean age of the population is younger than 25? Let alpha = .05 STEPS SOLUTION 11 12 13 14 15

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