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Methodology used for Sun poll
OpinionWorks completed 798 telephone interviews Oct. 15-20 among likely general election voters across Maryland. According to customary statistical standards, this sample produces a margin of error of no more than 3.5 percentage points at a 95 percent confidence level. This means that 95 percent of the time, the "true" figure would fall within this range if every likely general election voter in Maryland had been interviewed.
By Steve Raabe, Special to The Baltimore Sun
October 23, 2010