© 1970 by Biometrika Trust
On the application of the method of Das in evaluating a multivariate normal integral
Southern Methodist University
Das (1956) presented a method of evaluating pr(x1 > a1, ..., xn > an) for a multivariate normal distribution which reduced the dimension of integration by the use of the univariate cumulative normal. This note investigates properties of the variance-co variance matrix that indicate how small this dimension of integration might be and presents a method of detenmning the coefficients for the expression of Das.