Case Study 10-1

A psychologist is interested in whether hypnosis affects brain dominance. Twelve college students from the freshmen class are randomly sampled for an experiment. The experiment has two conditions which are given on different days. In condition 1, the students are hypnotized and then given a test which measures the relative dominance of the right and left hemispheres. The higher the score, the more dominant is the right hemisphere. In condition 2, the same students are given the test again, only this time they are not hypnotized but are in their normal state of consciousness. The following scores are obtained.

Student 123456789101112

Condition 1201622182330161914161725

Condition 2141317192122142212141522

Refer to Case Study 10-1. The obtained probability = _________.

a.0.0161

b.0.0384

c.0.0192

d.0.0322