Figure 10.13: Figure 10.8 The Critical Value of F for 2 and 7 Degrees of Freedom The critical value of F, Fcv, with 2 degrees of freedom in the numerator and 7 degrees of freedom in the denominator, is 4.737. Note that 5% of the F distribution falls on or to the right of this point. If the observed value of F falls in the rare zone, then the null hypothesis is rejected.