2019 public survey of attitudes toward the justice system [pdf, 1.2 MB]
...surveys do not randomly select respondents. Rather, they allow respondents to make their own decision about participating in the survey. Self-selection surveys are used with a wide range of research designs as they may significantly reduce time and cost of data collection. At the same time these surveys are subject to self-selection bias and their results cannot be analysed using probabilistic statistical methods. In particular, it is not possible to assess margins of error, confidence int...