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 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 interval to