Normal distribution calculator - free statistics book, Normal distribution . author(s) david m. lane prerequisites. areas under normal distribution. Normal distribution - sigma material, The normal distribution is generally credited to pierre-simon de laplace. karl gauss is generally given credit for recognition of the normal curve of errors.. Normal approximaiton binomial, Instructions. a "begin" button will appear on the left when the applet is finished loading. this may take a minute or two depending on the speed of your internet.