Yes, it's a basic question. But, I have searched about 25 web pages for this and found only things that were irrelevant or incomprehensible. So I have indeed tried.
My question is: I have two samples. I know their sizes, means, and standard devs. I just need a simple formula or procedure for determining the probability that they represent the same normal distribution. I know it's out there. In the distant past, I've used it myself. But can't remember it now. Can anyone point me to it? Thanks.