Mathematics, 14.12.2019 02:31 kaybreezy
The mean tar content of a simple random sample of 35 unfiltered cigarettes is 21.1 mg, with a standard deviation of 3.2 mg. the mean tar content of a simple random sample of 30 filtered cigarettes is 13.2 mg with a standard deviation of 3.7 mg. at a significance level of 0.01, do the results suggest that, on average, filtered cigarettes have less tar than unfiltered cigarettes?
Answers: 3
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The mean tar content of a simple random sample of 35 unfiltered cigarettes is 21.1 mg, with a standa...
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