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

15	19	16	18	10	20	19	13
22	9	19	22	18	20	24	19

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 interval __________________to______________________