A researcher records the repair cost for 27

randomly selected VCRs. A sample mean of $86.26 and standard deviation of $11.77

are subsequently computed. Determine the 90%

confidence interval for the mean repair cost for the VCRs. Assume the population is approximately normal.

Step 2 of 2 : Construct the 90%

confidence interval. Round your answer to two decimal places.

asked by guest
on Nov 24, 2024 at 3:02 pm



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