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A random sample of 16 pharmacy customers showed the waiting times below (in minutes). 21 , 22, 14, 17, 20, 25, 19, 16, 22, 16,

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

21 , 22, 14, 17, 20, 25, 19, 16, 22, 16, 14, 17, 26, 19, 12, 18

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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 ?

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