In A Random Sample Of 40 Refrigerators The Mean Repair Cost Was 149 00 And The P

In a random sample of 40 refrigerators, the mean repair cost was $149.00 and the population standard deviation is $15.80. Construct a 90 %confidence interval for the population mean repair cost. Interpret the results.

Construct a 90%confidence interval for t he population mean repair cost. The 90%confidence interval is .(  ,  ).(Round to two decimal places as needed.)Interpret you results. Choose the correct answer below.

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


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The confidence interval contains 90%of the mean repair costs.


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

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