SOLUTION: In a random sample of 60 computers, the mean repair cost was $150 with a standard
Deviation of $36.
(a) Construct the 99% confidence interval for the population mean repair cost.
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-> SOLUTION: In a random sample of 60 computers, the mean repair cost was $150 with a standard
Deviation of $36.
(a) Construct the 99% confidence interval for the population mean repair cost.
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Question 525038: In a random sample of 60 computers, the mean repair cost was $150 with a standard
Deviation of $36.
(a) Construct the 99% confidence interval for the population mean repair cost.
(b) If the level of confidence was lowered to 90%, what will be the effect on the confidence interval
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