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How information for Washington Post survey was gathered

Monday, April 12, 2010; A10

This Washington Post poll was conducted by telephone March 25-29 among a random sample of 1,107 adult residents of the Washington area, including users of conventional and cellular phones. Interviews were conducted in English or Spanish. Results from the full survey have a margin of sampling error of three percentage points. Sampling, data collection and tabulation were conducted by Abt SRBI of New York. Results might not add up because of rounding or because "no opinion" numbers are not shown.

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