### Transform > Probability Distributions > Triangular

Calculates the probability densities, cumulative probabilities, and inverse cumulative probabilities for a Triangular distribution.

The triangular distribution is defined by three parameters, a lower limit a, an upper limit b, and number c, between a and b, called the mode. the probability density function (PDF) has the shape of a triangle in the X/Y plane with verices (a, 0), (b, 0), and (c, y), where y is chosen so that the area of the triangle is 1.

### Dialog box items

•Source Column:

Enter the column you want to evaluate.

•Target Column:

Enter a storage column for the generated values. Leave blank to have VisualStat automatically name the target column.

•Statistics:

Choose from the following options:

oProbability density: Choose to calculate the probability densities.

oCumulative probability: Choose to compute the cumulative probabilities.

oInverse cumulative probability: Choose to compute the inverse of the cumulative probabilities.

•Distribution: Select the distribution for the variable.

•Lower Bound: The lower limit of the distribution.

•Upper Bound: The upper limit of the distribution.

•Mode: Gets the mode of the distribution.

### Example

Example of using the probability density function (pdf)

Probability Distributions

Web Resource: Weisstein, Eric W., Wolfram MathWorld. | Wikipedia