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Page 63
Suggested Citation:"Glossary." National Academies of Sciences, Engineering, and Medicine. 2005. On-Board and Intercept Transit Survey Techniques. Washington, DC: The National Academies Press. doi: 10.17226/13866.
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Page 63

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63 On-board and intercept surveys—self-administered surveys distributed on board buses and rail cars and in stations, and personal interviews conducted in these environments. Sample—group of people selected to be surveyed and that the researcher attempts to contact. Sample frame—listing of the study population from which the sample will be drawn. Sampling error—difference between the true (but unknown) value and observed values if, hypothetically, the survey were repeated numerous times. Simple random samples—sample in which each person in the study population has an equal chance of being selected. Stratified sample—sample divided into separate subsamples, each of which is then sampled as a simple random sample. Study population—population to which the researcher can gain access. Theoretical population—population to which researchers wish to generalize. GLOSSARY

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TRB’s Transit Cooperative Research Program (TCRP) Synthesis 63: On-Board and Intercept Transit Survey Techniques examines transit agencies’ experiences with planning and implementing on-board and intercept surveys. On-board and intercept surveys include self-administered surveys distributed on board buses and railcars, and in stations, as well as interviews conducted in these environments. The report provides an overview of industry practices and covers a broad range of issues addressed in planning a given survey.

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