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Analysis of Variance2
Error of Measurement2
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A Workshop on Explained Variance: Its Importance and Techniques for Calculation.
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Good, Ron – 1980
Knowledge of the magnitude of effect(s) of an experimental study in science education should be of utmost concern to researchers in the field, but is often not reported. This document describes the concept of "explained variance" in analysis of variance designs and then explains how it can be calculated and reported. Reporting the magnitude of…
Descriptors: Analysis of Variance, Error of Measurement, Research, Research Design
Misuses of Regression Approaches to ANOVA and ANCOVA.
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Willson, Victor L. – 1982
The current state of usage of regression models in analysis of variance (ANOVA) designs is empirically examined, and examples of several statistical errors made in usage are presented. The assumptions of the general linear model are that all predictors are known without error of measurement and are fixed with no replication or sample variation; in…
Descriptors: Analysis of Covariance, Analysis of Variance, Error of Measurement, Generalization