A Researcher Studied Whether Meeting Regularly with a Weight-Loss Counselor

question 8

Multiple Choice

A researcher studied whether meeting regularly with a weight-loss counselor helps dieters lose weight. Eighty dieters were available for the study. Half the dieters, assigned at random, received weight-loss counseling. The other half did not. After six months, the weight lost by each dieter was measured. On the average, those who met regularly with a weight-loss counselor lost more weight than those who did not.
In order to create groups of subjects that should be similar, on average, in all respects, we use

• A) lurking.
• B) confounding.
• C) randomization.
• D) All of the above

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