Calculates the probability densities, cumulative probabilities, and inverse cumulative probabilities for a gamma distribution.
The gamma distribution is often used to model positively skewed data. Use when random variables are greater than 0.
Enter the column you want to evaluate.
Enter a storage column for the generated values. Leave blank to have VisualStat automatically name the target column.
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.
•Alpha: Enter a alpha shape parameter to define the gamma distribution
•Beta: Enter a beta scale parameter to define the gamma distribution