Here I plotted Standard Deviations vs Z Values on x - axis (Red) Normal Probabilities vs Z Values on x - axis (Purple) You can Model Sigma(x) to the Red Curve by moving Sigma 1 and Mu. Activate Functions: Click in Boxes. Look at : Mu = - 5 and Sigma = 4.69 Notice how it models the probabilities of the Normal Curve.
See Above