Construct the interval using mean and standard deviation

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Reference no: EM13136000

As the new manager for a CPA firm, you want to establish the confidence interval for the time to complete a medium sized organization's tax return. A sample of 25 medium corporate accounts is selected at random. The sample mean and standard deviation are 20 days and 4 days, respectively. Using a confidence interval of 90%, construct the interval.

Reference no: EM13136000

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