A student records the repair cost for27 randomly selected dryers. A sample mean of$58.03 and standard deviation of$26.34 are subsequently computed. Determine the90%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.

Step 2 of 2:Construct the90% confidence interval. Round your answer to two decimal places.

lower endpoint: upper endpoint: