• State the statistical hypotheses;
• State the statistical tests you choose to use. Be specific (how many population, right, left or two-tail, and why do you choose this test);
• State the decision rules;
• Perform the statistical tests in R or by hand;
• Report the results;
• State the statistical decision.

Some researchers have observed a greater airway resistance in smokers than in non-smokers. Suppose a study is conducted and it compares the percent of the tracheobronchial retention of particles in smoking-discordant monozygotic twins, yielded the results attached in the uploaded document.

Do these data support the hypothesis that tracheobronchial clearance is slower in smokers? Let alpha-0.05. determine the p value for this test?

Smoking	Nonsmoking
60.6	47.5
12	13.3
56	33
75.2	55.2
12.5	21.9
29.7	27.9
57.2	54.3
62.7	13.9
28.7	8.9
66	46.1
25.2	29.8
40.1	36.2