This video describes five common methods of sampling in data collection. Each has a helpful diagrammatic representation.
0:00 Introduction
0:15 Definition of a sample and population
0:45 Criteria - unbiased, representative
1:09 Sampling error
1:36 Simple random sampling
2:23 Convenience sample
2:55 Systematic sampling
3:26 Cluster sampling
3:59 Stratified sampling
4:44 Choosing a sampling method
A useful companion video explains what sampling error is:
https://youtu.be/y3A0lUkpAko
See https://creativemaths.net/videos/ for all of Dr Nic's videos organised by topic.
You might like to read my blog:
https://creativemaths.net/blog/
#DrNicStats #Statistics