Chapter 5: Designing Studies Key Vocabulary: voluntary response sample observational study confounded experimental units population subjects sample treatment design factor convenience sampling level biased placebo effect simple random sample control group table of random digits randomization probability sample completely randomized experiment stratified random sample statistically significant strata replication undercoverage hidden bias nonresponse double-blind experiment response bias block design sampling frame matched pairs design systematic random sample Sampling and Surveys How does a population differ from a sample? What are the steps to planning a sample survey? Why are unreliable? voluntary response samples Why might be unreliable? convenience sampling What is a study? biased Define simple random sample. What two properties of a make it a good choice for creating a simple table of random digits random sample?
Chapter 5: Designing Studies Key Vocabulary: voluntary response sample confounded population sample design convenience sampling biased simple random sample table of random digits probability sample stratified random sample strata undercoverage nonresponse response bias sampling frame systematic random sample observational study experimental units subjects treatment factor level placebo effect control group randomization completely randomized experiment statistically significant replication hidden bias double-blind experiment block design matched pairs design Sampling and Surveys How does a population differ from a sample? What are the steps to planning a sample survey? Why are voluntary response samples unreliable? Why might convenience sampling be unreliable? What is a biased study? Define simple random sample. What two properties of a table of random digits make it a good choice for creating a simple random sample?
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