CDF?

Robert Israel — Wed, 16 Mar 2011 08:35:40 Z

Do you mean something like this?

> with(Statistics):
   Xn:= RandomVariable(Binomial(300, 0.6));
   Yn:= (Xn - Mean(Xn))/StandardDeviation(Xn);
   F:= y -> CDF(Yn, y);
   F(6/7) - F(-6/7);

.6232180159

In such a way

hirnyk — Wed, 16 Mar 2011 09:24:45 Z

You need not to create any function.
> with(Statistics):
> X := RandomVariable(Normal(0, 1));
> CDF(X, 6/7, numeric);

0.8043170308
> CDF(X, -6/7, numeric);

0.1956829692
> CDF(X, 6/7, numeric)-CDF(X, -6/7, numeric);

0.6086340616

Also look at ?CDF .

MaplePrimes - answers and comments on Question, How can I calculate F(6/7) - F(-6/7) to find probability related to central limit theory?

CDF?

In such a way