Boxs M test: (a) Is a test of the homogeneity of variance assumption underlying ANOVA (b) Should

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Box’s M test:

(a) Is a test of the homogeneity of variance assumption underlying ANOVA

(b) Should be ignored at all times

(c) Is a test of the homogeneity of variance–covariance matrices

(d) Is applicable only for split-plot designs

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