<sigma> Specifies the sigma parameter for the distribution.It can also be a formula using variable N that stands for the nominal value. For example, the formula N*0.5 would mean a sigma value that equals half the nominal value. <alpha> Specifies the alpha parameter for the distribution. <beta> Specifies the beta parameter for the distribution. <low> Specifies the optional low limit for the distribution, defined as a relative value with respect to the mean value of the distribution. It should be a real value, or also can be a formula using variables N and S that stand for the nominal and sigma value. For example, the formula -3*S would mean a low cutoff limit that equals three times the sigma value.
<high> Specifies the optional high limit for the distribution, defined as a relative value with respect to the mean value of the distribution. It should be a real value, or also can be a formula using variables N and S that stand for the nominal and sigma value. For example, the formula 3*S would mean a high cutoff limit that equals three times the sigma value.