do principal component analysis work pca discrimination definition does principal component analysis (pca) work does pca work does pca work in discrimination analysis what is the pca used for in discrimination analysis what is the pca used for in discrimination analysis does principal component analysis work how does pca work how does pca work what is principal components in pca how is principal component analysis used in discrimination analysis pca how does it work does pca work in discrimination analysis does pca work? pca discrimination analysis what is the pca? does pca work do principal components in pca work how to measure pca bias in psychology