13 resultados para Observational methodologies

em University of Michigan


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National Highway Traffic Safety Administration, Washington, D.C.

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"ED/OPP93-43"--P. [C-7] (v. 1).

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"Prepared for: U.S. ... National Highway Traffic Safety Administration.

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Report provides a descriptive analysis of safety belt usage in Illinois. The survey was a statistical (multi-stage random) observational survey conducted statewide during ... on both high volume state highways and low volume local roads and residential streets. The survey provided a statistically representative sample of the state as a whole.

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"New Mexico State University Research Center ... AF 19(604)-5570. May 1961. Prepared for Geophysics Research Directorate, Air Force Cambridge Research Center, Air Research and Development Command, United States Air Force, Bedford, Massachusetts."