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Question

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

 

9 12 22 12 22 20 27 20

20 18 26 26 25 21 27 17


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.)

  

The 90% confidence interval_______ to_________ 

Step-by-step answer


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