A grain of salt

Noteworthy in this Globe and Mail article describing the results of the latest Nanos Research daily tracking poll, is that in every single region, except the Prairies, every single lead or deficit between the Tories and Liberals is about half the size of the corresponding margin of error.For example, an Atlantic “lead” of 2.3% with an expressed margin of error of 10.2% is, to put it mildly, a pretty useless piece of data…