Studentized range distribution (i.e., Q values) (α=0.01)

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The table below shows critical values for the studentized range distribution, the Q, probability distribution. The table displays Q values corresponding to an alpha value of 0.05. These values are used for determining honest significant differences when calculating Tukey-Cramer minimum significant differences (also termed honestly significant differences).

To choose the correct Q value, use the column corresponding to the number of comparison groups and the row corresponding to the degrees of freedom within each one.

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