The Mason-Dixon Florida Poll was conducted by Mason-Dixon Polling & Research, Inc. of Washington, D.C. from October 4 through October 6, 2008. A total of 625 registered voters were interviewed statewide by telephone. All stated they were likely to vote in the November general election. Those interviewed were selected by the random variation of the last four digits of telephone numbers. A cross-section of exchanges was utilized and quotas were assigned to reflect voter turn-out by county. The margin for error, according to standards customarily used by statisticians, is no more than plus or minus 4 percentage points. This means that there is a 95 percent probability that the "true" figure would fall within that range if all voters were surveyed. The margin for error is higher for any subgroup, such as a regional or party grouping.