**Syntax**

` >>> ALPHA: alpha (%)`

**Parent Command**

` >> ERROR`

**Subcommand**

` -`

**Description**

*alpha* is a probability used for a variety of statistical tests within iTOUGH2. The choice of *alpha* does not affect the estimated parameter set, but is used in the residual analysis, the Fisher model test, the analysis of the resulting distribution when performing Monte Carlo simulations, and the width of the error band when performing FOSM uncertainty propagation analysis. *alpha* is expected to assume values between 0.001 and 0.200 (default: 0.01). Instead of the risk *alpha*, one can also provide the confidence level (1-*alpha*), in which case *alpha* assumes values between 0.8 an 0.999. Use keyword % if *alpha* is given in percent.

**Example**

` > COMPUTATION
>> STOP
>>> number of TOUGH2 SIMULATIONS: 200
<<<
>> ERROR propagation analysis
>>> MONTE CARLO simulations
>>> print quantile for risk ALPHA =: 5.0 %
<<<
<<`

**See Also**

` - `