Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two
February 27, 2020
A company claims that its heaters last more than 5 years
February 27, 2020

A car company claims that the mean gas mileage for its luxury

A car company claims that the mean gas mileage for its luxury sedan is at least

24 miles per gallon. A random sample of 7 cars has a mean gas mileage of 23 miles per gallon and a standard deviation of 2.4 miles per gallon. At α=0.05, can you support the company’s claim?

 

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