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Do Cell Phones Skew Polls?

6:24 PM, Jul 18, 2008 • By JOHN MCCORMACK
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Yes, but not much:

The latest Pew Research Center national survey, conducted June 18-29 with a sample of 2,004 adults including 503 on a cell phone, finds that the overall estimate of voter presidential preference is modestly affected by whether or not the cell phone respondents are included. Barack Obama holds a 48% to 40% lead in the sample that includes cell phones, and a 46% to 41% advantage in the landline sample.