Question #5186

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?

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?

Expert's answer

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