Thank you Draycut for your quick answer. this is helpfull. your proposed SAS code will help me to simulate several normal samples. this will indeed allow to have a distribution of a serie of 100 variance. knowing that Y= (n-1)*samplevar/populationvar follow a Khi square distribution (n-1) ddl, what draw the variable distrution againt it's probabilty. I thought I should simulation of Y using Khi square and then derive the variable from their ! if my reasoning is true, I don't knwo how to do it via SAS.
... View more