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From a sample of 81 monthly returns of a stock, you have determined a sample mean of 1.93% and standard deviation of 7.95% Construct a

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From a sample of 81 monthly returns of a stock, you have determined a sample mean of 1.93% and standard deviation of 7.95% Construct a 90% confidence interval for the monthly return and report the standard error as a decimal number rounded to 4 decimal places

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