topic Re: Need Help finding mean of random numbers in SAS Procedures

Need Help finding mean of random numbers

deleted_user — Wed, 21 Oct 2009 21:29:39 GMT

Hi,
I have generated 100 samples each with 100 random numbers between 0 and 1 using the following code (thnx patrick!):

data RandomNumbers;
do sample=1 to 100;
do n=1 to 1000;
RandomNumber=ranuni(0);
output;
end;
end;
run;

For each of these samples I found the mean using proc tabulate. Now, I need to find the (simulated) probability that the mean of a sample is between .49 and .5, inclusive.
Any ideas?

Is there a way to get the proc tabulate output into a dataset so I can then use "if" statements to keep all means between .49 and .5, count them and then divide by 100 to get the probability? Or is there a faster way to do this entirely in the data step (ie. using another loop)?
Thanks, your help would be much appreciated!

Re: Need Help finding mean of random numbers

Patrick — Wed, 21 Oct 2009 23:38:02 GMT

post deleted

Message was edited by: Patrick

Re: Need Help finding mean of random numbers

Paige — Thu, 22 Oct 2009 15:36:05 GMT

One solution:

PROC MEANS, BY SAMPLE with an OUTPUT statement, puts all your means into a dataset. Then, use another data step to count the times the mean is in the desired range, and the number of times it is not in the desired range.