One tail, middle, two tail and cumulative density functions can be calculated together with the raw frequency function.

You may enter directly Z values referred to N(0,1), or X values referred to a generic N(m, s).

In case of X values, the values for m=mean and s=standard deviation are also required. If Z values are entered, X values are computed according to m and s and the other way around.

F-Graph also works as a scientific calculator. You may enter the calculation clicking on the buttons of the application pad or directly directly enter the expression as text. Press = to perform the calculation. The calculator supports multiple level of parentheses. A parenthesis is automatically appended when a function button is pressed. You will have then to enter the argument and the closing brace.

Supported calculator functions:

- ln(X) logarithm base e
- log(X) logarithm base 10
- log2 logarithm base 2
- exp(X) e to X
- rtod radians to decimal degrees
- dtor decimal dgress to radians
- sqrt(X) square root of X
- nthroot(X, N) Nth root of X
- pow(N, X) N to X
- all common trigonometric functions. Arguments are entered and returned in radians

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