Teens-and-Mobile-Phones (1)

University of michigan graduate students also

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Unformatted text preview: y be larger than the margin of error for the total sample. For example, the findings for teen cell owners are based on a subsample of 625 teens and have a margin of error of ±4 percentage points; the findings for teen texters are based on a subsample of 552 teens and have a margin of error of ±5 percentage points. Sampling errors and statistical tests of significance in this study take into account the effect of weighting (described later in "Weighting and analysis"). Focus Groups The qualitative data comes from focus groups conducted by the University of Michigan and the Pew Research Center ’s Internet & American Life Project. Three of the focus Pew Internet & American Life Project Teens and Mobile Phones | 155 groups were conducted in one city in June 2009 and 6 more groups were held in 3 cities in October 2009 with teens between the ages of 12 and 18. Three of the groups were 42 F or a fuller discussion of this topic, please see the Project ’ s Teens and Distracted Driving r eport at h ttp://www.pewinternet.org/Repo...
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