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Can someone thoroughly explain numbers 12 and 13? 12. In a sample of 100 randomly selected men, it was found that their mean height was

Can someone thoroughly explain numbers 12 and 13?
12. In a sample of 100 randomly selected men, it was found that their mean height was 67 inches with a standard deviation is 20 inches. Assuming that the population of height measurements is normally distributed. Construct the 95% confidence interval for the population mean height of men. 13. In a sample of 9 randomly selected women, it was found that their mean height was 63 inches with a standard deviation is 2.4 inches. Assuming that the population of height measurements is normally distributed, construct the 90% confidence interval for the population mean height of women

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