t-test (for independent and dependent samples)

Type VI sums of squares . We propose the term Type VI sums of squares to denote the approach that is often used in programs that only implement the sigma restricted model (as opposed to programs like STATISTICA's VGLM which offers the user a choice between the sigma restricted and overparameterized ). This approach is identical to what is described as the effective hypothesis method in Hocking (1996).
For additional details, see the Six types of sums of squares topic in the General Linear Models chapter.