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A researcher records the repair cost for 22 randomly selected dryers. A sample mean of $84.67...

A researcher records the repair cost for 22 randomly selected dryers. A sample mean of $84.67 and standard deviation of $18.09 are subsequently computed. Determine the 98% confidence interval for the mean repair cost for the dryers. 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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