Burnett_Barr            Burnett and Barr Method for Nonparametric
                        ANCOVA
Harwell_Serlin          Harwell and Serlin Method for Nonparametric
                        ANCOVA
Hettmansperger_McKean   Hettmansperger and McKean Method for ANCOVA
McSweeney_Porter        McSweeney and Porter Method for Nonparametric
                        ANCOVA
Puri_Sen_BVCM           Puri and Sen Method for Nonparametric ANCOVA
                        with Biased Variance-Covariance Matrix
Puri_Sen_UVCM           Puri and Sen Method for Nonparametric ANCOVA
                        with Unbiased Variance-Covariance Matrix
Quade                   Quade Method for Nonparametric ANCOVA
Shirley                 Shirley Method for Nonparametric ANCOVA
pairwise_npANCOVA       Pairwise Post Hoc Comparisons for Nonparametric
                        ANCOVA
summary_npANCOVA        Summarize Nonparametric ANCOVA Results
