Hello, Thanks everybody for the answers, it looks like you really know what you are saying. The biggest problem I have is I don't understand what you mean by "want", "need" and "have" code. I'm not a mathematician, I just need the area under the curve, I don't understand all that you are saying, so I'm going to use Excel to calculate that. I prefer to be a weirdo in my department for not using SAS than kill myself trying to understand what you all are saying. Thanks again all for your effort. Really surprised me how much you know. Impressive. I prefer to keep using statistic packages more user frendly like Minitab or SPSS. Have a great day, Ary
... View more