Find the critical value from the Studentized range distribution with \(u=7\) degrees of freedom and \(k=3\) degrees of freedom, with a familywise error rate \(\alpha=0.05\).

Approach Look in Table \(\mathrm{X}\) with \(\alpha=0.05\) where the row corresponding to \(u=7\) intersects with the column corresponding to \(k=3\). The value in the cell is the critical value.