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What's on the worksheet
- A historical society's register lists the 660 gravestones of an old cemetery in order of burial.
- A herbarium wants to photograph about 22 of its 380 pressed-plant sheets, which sit in drawer order.
- At a craft fair the 72 stalls are numbered 1 to 72 along the aisles.
- A photo club's contest has 50 entries, numbered 1 to 50.
- A carousel has 40 horses numbered 1 to 40 around its ring.
- A machine fills printer ink cartridges with 8 nozzles that take turns:
- For each plan, say whether the systematic sample is likely to behave like a simple random sample, do worse, or do better, and explain why.
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The free lesson teaches it with worked examples and practice problems.
Systematic sample: the lesson ›More Chapter 3 worksheets: Collecting data: sampling and experiments
- 3.1Observational studies and experiments
- 3.2Stratified random sample
- 3.3Systematic sample
- 3.4Cluster samples and choosing a design
- 3.5Undercoverage and nonresponse
- 3.6Units, treatments, factors and levels
- 3.7Control groups, placebos and blinding
- 3.8Random assignment and confounding
- 3.9Completely randomized design and replication
- 3.10Blocking: randomized block and matched pairs designs