Mathematics, 29.04.2021 19:00, afolmar2006

researcher records the repair cost for 27 randomly selected VCRs. A sample mean of $74.63 and standard deviation of $26.00 are subsequently computed. Determine the 90% confidence interval for the mean repair cost for the VCRs. Assume the population is approximately normal. Step 1 of 2 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

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researcher records the repair cost for 27 randomly selected VCRs. A sample mean of $74.63 and standa...