Critical Case sample?

Question

I need a definition of critical case sample and if possible a complete reference to it. Can anyone help?

Answer 1

Scroll down to the middle of the page
http://en.wikipedia.org/wiki/Case_studies

Answer 2

Definition is: Critical-case sample. A single case that provides

a crucial test of a theory, program, or other

phenomenon.
OR
“critical case”
sample, or a case which “can make a point quite dramatically” or is “for some reason particularly important in the
scheme of things.”

That is the best I can do..Sorry~ss

Answer 3

A critical case sample is a population that has strategic importance to the theory in question, generally fulfilling many control factors. I couldn't think of a better example than this one on Wikipedia. This also compares other methods of sampling.

http://en.wikipedia.org/wiki/Sampling_%28case_studies%29

Hope this helps