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Hypothesis using a paired-sample sign test

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It was thought that hypnosis would lower a person's desire to smoke. A researcher decided to investigate this hypothesis using a paired-sample sign test in which the number of cigarettes/day smoked by subjects was recorded before and after hypnosis. Given that the critical value for ten samples at a = 0.05 in a one-tailed test is 1, is there enough evidence to support the hypothesis?

Subject 1 2 3 4 5 6 7 8 9 10
Before Hypnosis (Cigarettes/day) 18 20 25 15 19 21 30 16 13 20
After Hypnosis (Cigarettes/day) 16 18 24 10 20 23 26 15 14 18.

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Solution Preview

Solution. We form another row by taking a difference

Subject 1 2 3 4 5 6 7 8 9 10
Before Hypnosis (Cigarettes/day) 18 20 25 15 19 21 30 16 13 ...

Solution Summary

The solution prepares a hypothesis using a paired-sample sign test.

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