Adjusted & combined differences as in Hansen & Bowers (2008)
HB08(alignedcovs)list with components:
First item
Second item
Squared Mahalanobis distance of combined differences from origin
degrees of freedom
Vector of sum statistics z't - E(Z't), where t represents cluster totals of the product of the covariate with unit weights. Hansen & Bowers (2008) refer to this as the adjusted difference vector, or d(z,x).
Matrix of null covariances of Z'x-tilde vector, as above.
A CovsAlignedToADesign object
Hansen, B.B. and Bowers, J. (2008), ``Covariate Balance in Simple, Stratified and Clustered Comparative Studies,'' Statistical Science 23.
balanceTest, alignDesignsByStrata