Which Polls Are Most Accurate?

This post was written by John on May 6, 2011
Posted Under: Cultural,Scientific Thinking,Statistical Thinking

Nate Silver, the well known statistical reporter compared the performance of the main polling organizations forecasting elections. The results of his comparison are shown in the chart.  What is shown is the average error of the pollsters predictions calculated for the number of polls they did.  For example, Quinnipac conducted 21 polls and on average missed the mark by 3.3 points.

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