Evaluation of probabilities for the noncentral distributions and the difference of two T -variables with a desk calculator
William C. Guenther · Journal of Statistical Computation and Simulation · 1978
It is demonstrated that integrals of the noncentral chi-square, noncentral F and noncentral T distributions can be evaluated on desk calculators. The same procedure can be used to compute probabilities for the distribution of the difference of two T-variables with equal degrees of freedom. The proposed method of computation can be used with any computer which yields probabilities for the chi-square and F distributions.