Quitting Smoking: Hypnosis One program to help people stop

Chapter , Problem 9

(choose chapter or problem)

Quitting Smoking: Hypnosis One program to help people stop smoking cigarettes uses the method of posthypnotic suggestion to remind subjects to avoid smoking. A random sample of 18 subjects agreed to test the program. All subjects counted the number of cigarettes they usually smoke a day; then they counted the number of cigarettes smoked the day after hypnosis. (Note: It usually takes several weeks for the subject to stop smoking completely, and the method does not work for everyone.) The results follow. Cigarettes Cigarettes Smoked per Day Smoked per Day After Before After Before Subject Hypnosis Hypnosis Subject Hypnosis Hypnosis 1 28 28 10 5 19 2 15 35 11 12 32 3 2 14 12 20 42 4 20 20 13 30 26 5 31 25 14 19 37 6 19 40 15 0 19 7 6 18 16 16 38 8 17 15 17 4 23 9 1 21 18 19 24 Using a 1% level of significance, test the claim that the number of cigarettes smoked per day was less after hypnosis.