In a random sample of 85 laptop computers, the mean repair cost was $170 with a population standard devation of $45. Compute the 99% confidence interval for the \mu to four decimals
Added by Brian J.
Step 1
- Sample size (\( n \)) = 85 - Sample mean (\( \bar{x} \)) = $170 - Population standard deviation (\( \sigma \)) = $45 - Confidence level = 99% Show more…
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In a random sample of 60 computers, the mean repair cost was $150 with a standard deviation of $36. Construct a 99% confidence interval for the population mean. DON'T JUST GIVE THE ANSWER - SHOW WORK AND EXPLAIN YOUR PROCESS EACH STEP OF THE WAY SO THAT I CAN FOLLOW WHAT YOU DID AND CHECK YOUR WORK.
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