A random sample of 16 pharmacy customers showed the waiting times below (in minutes).

Minutes 20 27 24 23 19 21 18 17 22 15 18 32 16 20 19 19

Click here for the Excel Data File

Find a 90 percent confidence interval for, assuming that the sample is from a normal population.(Round your standard deviation answer to 4 decimal places and t-value to 3 decimal places. Round your answers to 3 decimal places.)

The 90% confidence intervalto