supervisor records the repair cost for 17 randomly selected VCRs. A sample means of $⁢68.83 and a standard deviation of $⁢12.17 are subsequently computed. Determine the 80% 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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