If you need some information on the bell curve formula I have found some good information for you. Try, http://www.willamette.edu/~mjaneba/help/normalcurve.html, it has a simplified explaination of the bell curve. The bell curve got its name from the shape of the graph, which is bell shape. The name Bell Curve has a controversial book of the same title. The bell curve was around for probably
. a century before the book