sample of 75 stores in the chain, and measure the average daily sales. They find that sample mean is 5670 and sample standard deviation is 1750. Calculate a 90% confidence interval for the mean daily sales of their sales. * A. (5337.6, 6002.4) B. (2791.3, 8548.8) C. (5410.9, 5929.1) D. (3920.0, 7420.0) E. (5149.5, 6190.5)

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