In a random sample of 60 refrigerators, the mean repair cost was $119 .00 and th

Question

In a random sample of 60 refrigerators, the mean repair cost was $119 .00 and the population standard deviation is S 15.60 Construct a 90% or dence interval tr to population mean repair cost. Interpret the results Construct a 90% confidence interval for the population mean The 90% confidence interval is ( 115.70 , 122.30 ) (Round to two decimal places as needed.) Interpret you results. Choose the correct answer below O A. With 90% confidence, it can be said that the confidence interval contains the sample mean repair cost. repair cost B. O c. With 90% confidence, it can be said that the confidence interval contains the true The confidence interval contains 90% of the mean repair costs.

Explanation / Answer

Interpretation:

With 90% confidence, it can be said that the confidence interval contains the true mean repair cost.

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