Close Confidants and Social Networking SitesA previous exercise introduced a study in which 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in the last six months “with whom you discussed matters that are important to you.” The average number of close confidants for the full sample is 2.2. In addition, the study asked participants whether or not they had a profile on a social networking site. For the 947 participants using a social networking site, the average number of close confidants is 2.5 with a standard deviation of 1.4, and for the other 1059 participants who do not use a social networking site, the average is 1.9 with a standard deviation of 1.3. (a) Do the sample data provide evidence that those who use social networking sites tend to have more close confidants on average? Yes or No. (b) Describe a possible confounding variable that might be influencing the association in part (c).
Close Confidants and Social Networking Sites
A previous exercise introduced a study in which 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in the last six months “with whom you discussed matters that are important to you.” The average number of close confidants for the full sample is 2.2. In addition, the study asked participants whether or not they had a profile on a social networking site. For the 947 participants using a social networking site, the average number of close confidants is 2.5 with a standard deviation of 1.4, and for the other 1059 participants who do not use a social networking site, the average is 1.9 with a standard deviation of 1.3.
(a) Do the sample data provide evidence that those who use social networking sites tend to have more close confidants on average? Yes or No.
(b) Describe a possible confounding variable that might be influencing the association in part (c).
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