You can request these distributions with the BETA, EXPONENTIAL, GAMMA, LOGNORMAL, NORMAL, and WEIBULL options, respectively. If you do not specify a distribution option, a normal P-P plot is created.
exponential, gamma, normal, Weibull, or Weibull2 distribution or the required shape parameter for the lognormal option SIGMA= Specify slope of distribution reference line for the lognormal or Weibull2 ...