The simulation displays a diagram with a standardized Gaussian normal distribution curve. The user can choose z-value(s) and the area left, right or between the chosen z-values is displayed. The simulation also calculates the related probabilities.
The simulation is well suited to support teaching the basics of normal distributed variables. It frees the instructor from working with the normal distribution table and displays the related graph interactively.
Probabilities are calculated with one digit behind the decimal point for two reasons. One is that the underlying algorithm does not provide more precision. The other reason is that this application not intended be used by students to answer homework questions.