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Journal of Educational…

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Note on the Variance and Covariances of Three Error Types

Peer reviewed

Harris, Chester W. – Journal of Educational Measurement, 1973

A brief note presenting algebraically equivalent formulas for the variances of three error types. (Author)

Descriptors: Algebra, Analysis of Covariance, Analysis of Variance, Error of Measurement

Multilevel Factor Analysis of Class and Student Achievement Components.

Peer reviewed

Muthen, Bengt O. – Journal of Educational Measurement, 1991

Data from the Second International Mathematics Study for 3,724 eighth graders are used to demonstrate the potential of multilevel factor analysis (MFA) methodology. Issues related to between-class and within-class decomposition of achievement variance and the change in this decomposition over the course of the eighth grade are revealed through…

Descriptors: Academic Achievement, Analysis of Variance, Classes (Groups of Students), Equations (Mathematics)