Hello, can someone tell me how to simulation sampling distribution of variance.
my assumptions are : N : 50, mean 0.012 and variance : 0.0178
I think it should be Khi-square dist, I don't know how to do that via SAS.
thanks a lot
You can simulate multiple samples of size N=50 like this. Should get you far
data Normal;
call streaminit(123);
do SampleID = 1 to 100;
do i = 1 to 50;
x = rand("Normal", 0.01284, 0.01797);
output;
end;
end;
run;
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.
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