Question

What does simple, stratified, systematic, convenience, and voluntary mean in mathematics?

Answer 1

These are terms used in Statistics for randomly chosen samples from a pool of samples (called population).
Simple sample: A sample that is as likely to be chosen as any other sample from the population.
Stratified sample:The population is divided into similar, nonoverlapping groups. Then a simple sample is chosen from each group.
Systematic sample: Each item is selected according to a specific time or unit interval.
Convenience Sample: Any sample that consists of population items that are easily accessed.
Voluntary Sample: A sample which includes only willing participants.

Answer 2

Thank you!

Answer 3

You are welcome.