sampling frame

Second, there is not a good sampling frame.

Of particular import for election surveys, the sampling frame includes many adults who are not likely to vote.

Turnout is a major factor, but it’s unpredictable Murray said when he began polling for the 2016 election, he initially used a restrictive sampling frame because he anticipated the election would have particularly low turnout.

But another possibility is the sampling frame of the survey.

But the outright exclusion of a large number of eligible voters — many of whom are likely to participate — from the sampling frame creates big risks if the excluded groups have very different political views from the groups who could be selected.