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In a random sample of 40 cars, the mean repair cost is $150. assuming a population standard deviation = $15.5. What is the 99% confidence
- In a random sample of 40 cars, the mean repair cost is $150. assuming a population standard deviation = $15.5.
- What is the 99% confidence interval for the population mean repair cost?
- What is the 99% confidence interval for the population mean repair cost if the sample size becomes n = 60 cars? Which confidence interval has a better estimate? this or the one with a sample of n = 40?
- What is the 99% confidence interval using a population standard deviation of = $19.5. Which confidence interval is wider and why?
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Construction accounting and financial management
Authors: Steven j. Peterson
2nd Edition
135017114, 978-0135017111
