This tutorial describes the characteristics of the Normal Probability Distribution and explains how to obtain any area under the curve using the Z table. It also demonstrates how to transform X values to Z values, and how to work backwards to obtain a Z value and its corresponding X value given the area under the curve. After reviewing this tutorial you should be able to obtain any probability under the curve, below any X value, above any X value, and between any X values. You should also be able to obtain the X value for any given area under the curve.