A gamma distributed random variable.
| field | type | contents / default value | |
| type | choice | type: probability distribution type - normal | |
| mean | double | 1.0 | mean: the mean of the pdf |
| scale | double | 1.0 | scale: standard deviation for normal dist. |
| gamma | double | 2.0 | gamma: shape parameter for gamma distribution |
| RandomVariable-results | object | CalcResults |