The mean tar content of a simple random sample of 25 unfiltered king-size cigarettes is 21.0 mg, with a standard deviation of 3 mg. The mean tar content of a simple random sample of 25 filtered 100-mm cigarettes is 13.0 mg with a standard deviation of 3.8 mg. The accompanying table shows the data. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Let population 1 be unfiltered king-size cigarettes. Complete parts (a) through (c) below. Click the icon to view the data. a. Use a 0.10 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? Identify the null and alternative hypotheses. OA. Ho: H1

H2 Hy: H1 = H2 OE. Ho: H1 > H2 OF. HO: H1 = H2 OD. Ho: H1 = H2 H1: 41 = H2 H1: H1 -H2 Hy: H1 # H2KING TAR 100 TAR 22 5 26 16 27 18 18 12 19 13 23 13 19 16 23 14 22 14 22 8 21 13 20 13 19 12 22 14 19 2 9 16 22 16 21 12 19 15 26 16 21 15 22 16 23 7 18 16 21 14