Studentized Range Distribution

Prerequisites
All Pairwise Comparisons Among Means


This program calculates areas in the tails of the Studentized Range Distribution. First specify the value of the studentized range statistic (Q). Q is computed as follows:





Some programs compute the value of the studentized t by including a 2 in the denominator. If so, then you should multiply the t by 2.77 to convert it to Q.


Then specify the number of means in the experiment and the degrees of freedom (df). Click the “OK” button and the two-tailed probability will be shown at the bottom.