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What's on the worksheet
- A port's customs office lists the 160 shipping containers unloaded this week, each holding about 48 boxes.
- A made-up summer camp has 20 cabins, labeled 01 to 20, holding 183 campers in all:
- A packing house received 120 crates of oranges today.
- A made-up community orchestra has 6 violinists, who practiced 2, 4, 6, 8, 10 and 12 hours last week.
- An introductory biology course at a university has 40 discussion sections, and every student in the course is in exactly one of them.
- Mateo plans a door-to-door survey of a made-up island region whose 150 villages each hold about 20 households.
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Cluster samples and choosing a design: 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