PLANNING AND ANALYSIS OF NON-EXPERIMENTAL STUDIES.

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)

Document Details

Document Type
Technical Report
Publication Date
Apr 26, 1968
Accession Number
AD0669462

Entities

People

  • W. G. Cochran

Organizations

  • Harvard University

Tags

DTIC Thesaurus Topics

  • Accidents
  • Human Population
  • Precision
  • Seat Belts

Readers

  • Neurotrauma and Rehabilitation Medicine.
  • Statistical inference.
  • Team-Based Human-Centered Cognitive Task Decision Making and Information Performance.