qtukey

Finds the Tukey's q studentized range critical value.

This function finds the Tukey's q studentized range critical value. This modified macro is based on the Fortran77 algorithm AS 190.2 Appl. Statist. (1983). It needs the sample degrees of freedom (must be the same for each sample), the k number of samples and the p-cumulative probability value (default=0.95). It gives a very good approximation for 0.8 < p < 0.995).