Discussion:
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
P-value (optional)
Conclusion (i.e. decision) on H0:
Final Conclusion on the claim