NGD-A FORTRAN IV Program for Fitting the Normal Generated Distribution
Behavior Research Methods & Instrumentation
The distribution of a random variable p, where p is constrained on the domain 0 < p < 1, is often of interest. For example, p could be a subjectively estimated probability of a subject’s preference for an item, or it could be the fraction of questions that a subject answers correctly on a test. In examples like these, the beta distribution is often used for the probability density function (PDF) of p, that is, the distribution of the random variable p over a set of subjects.
H. C. Romesburg, K. Marshall, and J. V. DeGraff. 1980. NGD-A FORTRAN IV Program for Fitting the Normal Generated Distribution. Behavior Research Methods and Instrumentation, 12(3):385-386.