The subjects for the study described in Example 12 were evaluated for abstinence from cigarette smoking at the end of 12 months. The table shows the percentage in each group that were abstaining.

a. Find the approximate margin of error for the abstinence percentage in each group. Explain what a margin of error means.
b. Based on the results in part a, does it seem as if the difference between the bupropion-only and place boonly treatments is statistically significant? Explain.
c. Based on the results in part a, does it seem as if the difference between the bupropion-only and nicotine patch with bupropion treatments is statistically significant? Explain.
d. Based on the results in parts a, b, and c, how would you summarize the results of this experiment?

Transcribed Image Text:

Abstinence Sample Croup Nicotine patch only Bupropion only Percentage Size 244 244 Nicotine patch with bupropion 35.5 245 160 16.4 30.3 Placebo only 15.6