Explain the differences among the following sampling techniques: simple random sample, stratified sample, systematic sample, cluster sample, multistage sample, and convenience sample. Describe situations in which each type might be useful.

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Explain the differences among the following sampling techniques:

1) Simple random sample

2) Stratified sample

3) Systematic sample

4) Cluster sample

5) Multistage sample and

6) Convenience sample

Describe situations in which each type might be useful.