I'm stumped on figuring this one out do u figure out the mean first?

Home ser=08launchUrl=https%2530%252F%252Fnewconnect.mheducation.com%252F#/activity/ques 8-3 Homework: Chapter 8 (Sections 8.1 through 8.5) ( Saved 7 A random sample of 16 pharmacy customers showed the waiting times below (in minutes). 22 19 19 19 21 17 20 24 19 5 25 26 21 19 21 points Click here for the Excel Data File Skipped 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.) Book The 90% confidence interval to Ask Print References