Descriptor
| Analysis of Covariance | 1 |
| Computer Oriented Programs | 1 |
| Matrices | 1 |
| Statistical Significance | 1 |
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| Journal of Educational and… | 1 |
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| Hunka, Steve | 1 |
| Leighton, Jacqueline | 1 |
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| Journal Articles | 1 |
| Reports - Evaluative | 1 |
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Peer reviewedHunka, Steve; Leighton, Jacqueline – Journal of Educational and Behavioral Statistics, 1997
Computational and plotting problems are often encountered with the Johnson-Neyman analysis of covariance procedure (P. Johnson and J. Neyman, 1936) when using three covariates. Use of an appropriate design and contrast matrix for the general linear model and the Mathematica software system to overcome these problems is described. (SLD)
Descriptors: Analysis of Covariance, Computer Oriented Programs, Matrices, Statistical Significance
