The margin of error for the Palestinian sample is 3 percentage points.

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The survey's sampling error is plus or minus 3 percentage points for the overall sample.

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The survey's overall sampling error is plus or minus 3 percentage points and plus or minus 6 percentage points for the African-Americans sample.

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The GOP sample of 306 likely caucus participants had a margin of error of 6 percentage points.

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The sample of 303 likely Democratic caucus voters has a margin of error of 6 percentage points.

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Results for the full sample have a margin of sampling error of plus or minus 3.9 percentage points, it is larger for subgroups.

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The number that see themselves as aggressive in this sample is also significant at 36 percent, which is more than double the percentage from our 2011 survey.

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"With such a large, totally random sample, we are assured of equal representation of age, income, ethnicity, and a certain percentage of households from each state, " he says.

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