The Bell Curve, Any Statistical Spread Of Numbers Based On Many Chance 50%:50% Comings & Goings, Is f(x) = e^(-x^2). Good Luck Trying To Integrate The Bell Curve, Because You Can't. And Furthermore, 'Normal' Or f(0) Both And Neither Does & Does Not Exist. In Other Words, 'Should' Is A Normative Statement. And Can, Literally, Mean ANYTHING.