A note on the calculation of probabilities in an F -distribution

Tests of significance based on analysis of variance calculations often require the determination of the probabilities of obtaining values of F greater than those arising from the analysis. These probabilities are customarily obtained from tables of the F -distribution. However, when the calculations are done on a computer, it would be convenient if estimates of these probabilities could be calculated by the analysis of variance program and presented in the output of the results. This note gives a simple method of doing so.