Cycling and Self-Selection Bias

A Mail on Sunday article starts a headline with:

We will ditch Boris Johnson over bike lanes, say 27 percent of Tory voters

The claim derives from a self-selecting survey, run by FairFuelUK. The questions are likely to be leading for respondents. Recent surveys suggest around 2% of GB adults think transport is an important issue.

Self-selection bias

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Anthony B. Masters

Anthony B. Masters

This blog looks at the use of statistics in Britain and beyond. It is written by RSS Statistical Ambassador and Chartered Statistician @anthonybmasters.