Fix distibution for Gamma  * incompleteGamma is already normalized. There is no need to divide by gamma twice  * Check when x <= 0 in cumulative and density
Fix distibution for Gamma
 * incompleteGamma is already normalized. There is no need to divide by gamma twice
 * Check when x <= 0 in cumulative and density


bos/statistics,mihaimaruseac/statistics,Shimuuar/statistics,mihaimaruseac/statistics,mihaimaruseac/statistics,bos/statistics,Shimuuar/statistics,fpco/statistics,fpco/statistics