1. Distinguish between probability and non-probability sampling and discuss the advantages and disadvantages of each. If you can not specify the probability that any given individual will be in the ...

Non-probability Sample: A sampling approach that does not confer every population member a known probability of selection, often necessitating additional statistical adjustments.

One possible explanation for the variability in estimates across the different nonprobability samples is the range of methods that online sample vendors employ. They differ on recruitment, weighting ...

This study reports the findings of a comparison between different non-probability sampling methods applied in a WWW-user-survey.

Oisín Tansey, Process Tracing and Elite Interviewing: A Case for Non-Probability Sampling, PS: Political Science and Politics, Vol. 40, No. 4 (Oct., 2007), pp. 765-772 ...

Web surveys can be conducted relatively fast and at relatively low cost. However, Web surveys are often conducted with nonprobability samples and, therefore, a major concern is generalizability. There ...