Posted: December 23rd, 2016

You want to study the physical effects of caffeine. To recruit participants for your experiment you post a sign up sheet for anyone willing to participate. This is an example of:

You want to study the physical effects of caffeine. To recruit participants for your experiment you post a sign up sheet for anyone willing to participate. This is an example of:
Random selection
Haphazard selection
Stratified selection
Type B selection