## A.4 F-DISTRIBUTION

Tables A.4, A.5, A.6 and A.7 show the *F-statistic* for four different values of α: 0.1, 0.05, 0.01 and 0.005. *v*_{1} is the number of degrees of freedom for the numerator and *v*_{2} is the number of degrees of freedom for the denominator. Figure A.4 illustrates the F-distribution. For example, to look up a critical value for the F-statistics where the numerator degrees of freedom (*v*_{1}) are 6 and the denominator degrees of freedom (*v*_{2}) are 15 and α is 0.05, using Table A.5, is 3.94.

**Figure A.4.** F-distribution

**Table A.4.** F-distribution where α = 0.1

**Table A.5.** F-distribution where α = 0.05

**Table A.6.** F-distribution where α = 0.01

**Table A.7.** F-distribution where α = 0.005