Catching a Cold Do well-rounded people getfewer colds? A study on the Chronicle of
Chapter 8, Problem 61(choose chapter or problem)
Catching a Cold Do well-rounded people getfewer colds? A study on the Chronicle of Higher Educationwas conducted by scientists at Carnegie MellonUniversity, the University of Pittsburgh, and the Universityof Virginia. They found that people who haveonly a few social outlets get more colds than thosewho are involved in a variety of social activities.16Suppose that of the 276 healthy men and womentested, n1 96 had only a few social outlets andn2 105 were busy with six or more activities. Whenthese people were exposed to a cold virus, the followingresults were observed:Few Social Outlets Many Social OutletsSample Size 96 105Percent with Colds 62% 35%a. Construct a 99% confidence interval for thedifference in the two population proportions.b. Does there appear to be a difference in thepopulation proportions for the two groups?c. You might think that coming into contact with morepeople would lead to more colds, but the data showthe opposite effect. How can you explain thisunexpected finding?
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