A random sample of 16 pharmacy customers showed the waiting times below (in minutes). 19 27 22 12 18 26 23 16 19 16 15 15 24 26 26 18 5 polis book Click here for the Excel Data File Find a 90 percent confidence interval for M, 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.)