NotesFAQContact Us
Collection
Advanced
Search Tips
Descriptor
Error of Measurement1
Measurement Techniques1
Statistical Analysis1
Source
Educational and Psychological…1
Author
Wilcox, Rand R.1
Publication Type
Journal Articles1
Reports - Descriptive1
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Showing one result Save | Export
An Approach to Ancova that Allows Multiple Covariates, Nonlinearity, and Heteroscedasticity
Peer reviewed Peer reviewed
Direct linkDirect link
Wilcox, Rand R. – Educational and Psychological Measurement, 2005
It is known that nonnormality, a heteroscedastic error term, or a nonlinear association can create serious practical problems when using the conventional analysis of covariance (ANCOVA) method. This article describes a simple ANCOVA method that allows heteroscedasticity, nonnormality, nonlinearity, and multiple covariates. When standard…
Descriptors: Statistical Analysis, Error of Measurement, Measurement Techniques