Accession Number : AD0669462

Title :   PLANNING AND ANALYSIS OF NON-EXPERIMENTAL STUDIES.

Descriptive Note : Technical rept.,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS DEPT OF STATISTICS

Personal Author(s) : Cochran,W. G.

Report Date : 26 APR 1968

Pagination or Media Count : 30

Abstract : The paper deals with statistical studies of human populations designed to investigate either analytical relationships among a number of variables or subgroups in the population, or some more specific cause-and-effect relationship (e.g., seat belts and injuries in auto accidents). Such studies are called non-experimental in the sense that the investigator cannot apply the causal agent to randomized groups of people. The three topics discussed are (i) preliminary aspects of planning, (ii) some simple types of study plan and analysis, and (iii) techniques for increasing precision and guarding against bias. (Author)

Descriptors :   (*POPULATION, STATISTICAL ANALYSIS), PERFORMANCE(HUMAN), GROUP DYNAMICS, BEHAVIOR, BIOMETRY, ACCURACY, CORRELATION TECHNIQUES, REGRESSION ANALYSIS, SAMPLING, UNCERTAINTY

Subject Categories : Sociology and Law
      Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE