Statistical i.e. Probability and statistics question

Not sure what Adobe program this refers to, but Google says, "Use the normal distribution with mean mu and variance sigma squared."

Sorry, but you are at the wrong forum. You should look in here

http://forums.adobe.com/index.jspa

for the forum of the Adobe product involved in your question, and repost it there. And when you do, please, do not forget to give a minimum of details.