preceded by has_specified_input has_specified_output achieves_planned_objective data transformation ANOVA false positive rate post-hoc analysis Scheffe test Alejandra Gonzalez-Beltran Philippe Rocca-Serra http://www.inside-r.org/packages/cran/agricolae/docs/scheffe.test Orlaith Burke STATO, adapted from wikipedia (http://en.wikipedia.org/wiki/Scheffé's_method) the Scheffe test is a data transformation which evaluates all possible contrasts and adjusting the levels significance by accounting for multiple comparison. The test is therefore conservative. Confidence intervals can be constructed for the corresponding linear regression. It was developped by American statistician Henry Scheffe in 1959. between group comparison objective p-value ready for release