[R] proportional chance criteria

[T. Murlidharan Nair]

Is there an R function that I can use to calculate the p-value from the
Z statistics computed for the relationship between chance and observed
proportions in predictions. More sprcifically I am refering to proportional
chance criteria (Cpro). Details are in Huberty's book on Applied 
discriminant
analysis, unfortunately our library has misplaced the book.   I got some 
details from the
following page 
 http://marketing.byu.edu/htmlpages/tutorials/discriminant.htm
but I still need to compute the p-val from their Z-statistic.
Thanks ../Murli