SOLUTION: In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained: 0.19, 0.09, 0.07, 0.18, 0.13, 0.06, 0.08. A

Question 870340: In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained: 0.19, 0.09, 0.07, 0.18, 0.13, 0.06, 0.08. Assuming that this sample is representative of the cars in use, construct a 98% confidence interval estimate of the mean amount of nitrogen-oxide emissions for all cars. If the EPA requires that nitrogen-oxide emissions be less than 0.165 g / mi, can we safely conclude that this requirement is being met?
What is the confidence interval estimate of the mean amount of nitrogen-oxide emissions for all cars?
__ g / mi
Can we safely conclude that the requirement that nitrogen-oxide emissions be less than 0.165 g / mi is being met?
A. Yes, because the confidence interval contains 0.165 g / mi.
B. No, because the confidence interval does not contain 0.165 g / mi.
C. Yes, we can definitely conclude that the requirement is met for all cars.
D. No, it is possible that the requirement is being met, but it is also very possible that the mean is not less than 0.165 g / mi.

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Two out of the seven samples don't meet the requirement!
See
http://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.823940.html

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