Hypothesis testing of mean-tar content in cigarettes

Reference no: EM13110250

Hypothesis Testing for Cigarette Tax:

The mean tar content of a simple random sample of 25 unfiltered king size cigarettes is 21.1 mg, with a standard deviation of 3.2 mg. The mean tar content of a simple random sample of 25 filtered 100 mm cigarettes is 13.2 mg with a standard deviation of 3.7 mg.

Use a 0.05 significance level to test the claim that unfiltered king size cigarettes have a mean tar content greater than that of filtered 100 mm cigarettes. What does the result suggest about the effectiveness of cigarette filters?

[Let population 1 be unfiltered king-size cigarettes.]

H0:

H1:

CV/CVs: t=

Test Statistic [Show procedure.] t =

P-value (optional) [Show a range of t values according to Table A-3.]

Conclusion (i.e. decision) on H0:

Reference no: EM13110250

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