Suppose you have a standard normal variable So its Gaussian
 Suppose you have a standard normal variable. So it\'s Gaussian with mean zero and variance 1. What is the probability that it will be negative ?
  Suppose you have a standard normal variable. So it\'s Gaussian with mean zero and variance 1. What is the probability that it will be negative ?
Solution
mu=0;
 std=1;
 s=10000;
 v=normrnd(mu,std,s,1);
 n=0;
 for i=1:s
 if v(i)<0
 n=n+1;
 end
 end
 prob=n/s
prob =
0.4985
probability is varying between 0.49 to 0.51

