Multivariate analysis of variance: Difference between revisions

Revision as of 04:54, 26 November 2024

Revision as of 08:04, 9 March 2025

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* <math display="inline">\bar Y</math>: where the <math display="inline">i</math>-th row is the best prediction given no information. That is the [[Sample mean and covariance|empirical mean]] over all <math display="inline">n</math> observations <math display="inline">\frac{1}{n}\sum_{k=1}^n y_k</math>

Then the matrix <math display="inline">S_{\text{model}} := (\hat Y - \bar Y)^T(\hat Y - \bar Y)</math> is a generalization of the sum of squares explained by the group, and <math display="inline">S_{\text{res}} := (Y - \hat Y)^T(Y - \hat Y)</math> is a generalization of the [[residual sum of squares]].<ref name="Anderson1994">{{cite book |last=Anderson |first=T. W. |title=An Introduction to Multivariate Statistical Analysis |year=1994 |publisher=Wiley}}</ref> <ref name="Krzanowski1988">{{cite book |last=Krzanowski |first=W. J. |title=Principles of Multivariate Analysis. A User's Perspective |year=1988 |publisher=Oxford University Press}}</ref>

Note that alternatively one could also speak about covariances when the abovementioned matrices are scaled by 1/(n-1) since the subsequent test statistics do not change by multiplying <math display="inline">S_{\text{model}}</math> and <math display="inline">S_{\text{res}}</math> by the same non-zero constant.