The table below shows critical values for the F_max probability distribution. The table displays F_max values corresponding to α=0.05. These values are used for determining significance when doing an F_max variance ratio test.

Typically, if you are deciding whether the observed variances deviate significantly from one another, you are interested in whether the calculated F value exceeds the F value in the table below corresponding to the column for the number of treatment groups and the row for the degrees of freedom in each of the groups.

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