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mework: Chapter 8 A random sample of 16 pharmacy customers showed the waiting times below (in minutes) 20 22 22 20 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 ences