Homework Question:

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

26 16 25 18 17 24 18 23

14 20 10 18 19 13 17 16

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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 ( )