In the immediate aftermath of the Scottish referendum there are many details of the campaign and the data to examine (expect more here next week). One particularly interesting feature is how the polls carried out during the final weeks of the campaign compare with the actual result.
The following chart shows the distribution of polls whose last day of fieldwork fell during the final two months of the campaign. The columns show the number of polls reporting a given percentage of people intending to vote Yes, once undecided voters are excluded. The dotted green line shows the actual percentage of people voting Yes in the referendum. Both the polls and the actual result are rounded to the nearest percentage point.