What is meant by a self-selected sample? Why are self-selected ...

[ghost!]

What is meant by a self-selected sample? Why are self-selected samples not desirable?

Question 2

____________________ sampling is particularly useful when it is difficult or costly to develop a complete list of the population members.
 Fill in the blank(s) with correct word

[bulacsom]

Answer to Question 1

A self-selected sample is a sample formed primarily on the basis of voluntary inclusion, with little control by the designer of the survey. Self-selected samples are usually biased, because those who participate are more interested in the issue than those who don't, and therefore probably have a different opinion.

Answer to Question 2

Cluster