Confidence interval estimate of the mean amount

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In a random sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained:

Nitrogen-Oxide Emissions (in grams per mile) 0.06 0.11 0.16 0.15 0.14 0.08 0.15 (based on data from the Environmental Protection Agency).

(a) Construct a 98% confidence interval estimate of the mean amount of nitrogen-oxide emissions for all cars.

(b) If the Environmental Protection Agency requires that nitrogen-oxide emissions be less than 0.165 grams/mile, can we safely conclude that this requirement is being met? Explain your reasoning.

Reference no: EM132340645

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