A famous nonverbal communication scholar believes that anxiety is an important variable in nonverbal behavior. On the basis of the assumption that anxious people have more energy than those who are calm, he hypothesizes that anxious people gesture more often while they talk than do calm people. He tests this hypothesis by randomly selecting five anxious people and five calm people (measured on a valid and reliable scale) from a university class. He tells each research participant to bring a friend to a laboratory where he videotapes 20 minutes of their conversation. He then counts the average number of gestures per minute made by each research participant. He obtains the following scores: Anxious People 4 Calm People 7 Set up the appropriate statistical test and make a decision. 3 4 3 6 5 9 5 9

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