OptionaldispersionDispersion for the tests instead of the estimate of the largest model.
OptionaltestThe test: "Chisq" (or its synonym "LRT"), "Rao", "F", "Cp", or false for none. Default, as R since
4.4.0: "Chisq" when the dispersion is known (binomial, poisson or dispersion given), else "F".
Options for glmAnova.