A manager records the repair cost for 14 randomly selected dryers. A sample mean of $88.34 and standard deviation of $19.22 are subsequently computed. Determine the 90% confidence interval for the mean repair cost for the dryers. Determine the population is approximately normal.

Step 1 of 2: Find the critical value that should be used in construction the confidence interval. Round your answer to three decimal places.

step 2 of 2: Construct the 90 % confidence interval. Round your answer to two decimal places. Lower endpoint: Upper endpoint: