A random sample of 16 pharmacy customers showed the waiting times below (in minutes). 17 15 18 27 16 14 Click here for the Excel Data File The 90% confidence interval 20 23 20 15 to 12 25 19 18 Find a 90 percent confidence interval for μ, 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.) 19 20

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