An important part of the marginal maximum likelihood method described previously is the computation of the integral over the random effects. The default method in PROC NLMIXED for computing this ...

THE probability integral can be represented by the simple approximation over such a range (t<3) as to make the approximation useful to the statistician and others whose problems do not require great ...

REFERRING to Prof. H. C. Plummer's letter on “An Approximation to the Probability Integral,” published in NATURE of October 25, the following alternative way of ...