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A sample of size 47 is drawn from a population whose distribution is approximately normal. The mean and standard deviation of the selected sample is

A sample of size 47 is drawn from a population whose distribution is approximately normal. The mean and standard deviation of the selected sample is 50 and 13.5, respectively. Calculate a 95% confidence interval for . (46.69, 53.31) (46.19, 53.81) (47.44, 52.56) (36.5, 43.5)

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