SME
Grade 11 Math · Problem type
Which sampling method?
Use this for “A school picks 20 students at random from each grade. Which sampling method is this?”
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Which sampling method is it?
Tap a card, then tap its group.
Random picks give every member a known chance; strata make sure every group is in, clusters save travel, and convenience is easy but usually biased.
Assumptions
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Random picks give every member a known chance of being chosen.
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Strata make sure every group is in the sample; clusters save travel.
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A convenience sample is easy but usually biased.
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Sampling methods and study design: surveys, experiments and observational studies
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Survey, observational study or experiment?
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Sampling methods and study design: surveys, experiments and observational studies
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