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The following sample is taken to estimate the average age of people in a local community. 51, 44, 66, 53, 46, 61, 29, 63, 54

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The following sample is taken to estimate the average age of people in a local community. 51, 44, 66, 53, 46, 61, 29, 63, 54 The mean of these data is 51.89. Assume a normal distribution with a standard deviation of 15. The lower bound for a 95% confidence interval for the population mean is: O 42.09 81.29 57.91 O 61.69 O 66.14

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