Statistical Adjustments When Comparing Preexisting Groups ANCOVA
- Author(s):
- Lord, Frederic M.
- Publication Year:
- 1968
- Report Number:
- RB-68-67
- Source:
- ETS Research Bulletin
- Document Type:
- Report
- Page Count:
- 6
- Subject/Key Words:
- Analysis of Covariance (ANCOVA), Statistical Analysis
Abstract
An illustration is given showing why the analysis of covariance usually does not provide the appropriate adjustment to compensate for preexisting differences between nonexperimental groups.
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- http://dx.doi.org/10.1002/j.2333-8504.1968.tb00724.x