sampling methods in gcse stats

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7 Terms

1
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simple random sampling

randomly assigned nums, hats, calcs, etc.

2
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stratified sampling

sample size is in proportion to pop

3
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systematic sampling

elements in pop chosen at intervals

4
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cluster sampling

divided into natural clusters, clusters randomly chosen, every member sampled.

5
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quota sampling

conveniently sample as many until quota reached

6
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opportunity sampling

convenience, no quota

7
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judgement sampling

done by researcher’s judgement