Mathematics, 12.04.2021 23:50, kev9369

A researcher records the repair cost for 27 randomly selected refrigerators. A sample mean of $97.89 and standard deviation of $17.53 are subsequently computed. Determine the 90% confidence interval for the mean repair cost for the refrigerators. 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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A researcher records the repair cost for 27 randomly selected refrigerators. A sample mean of $97.89...