The six sigma black belt should be familiar with the commonly used probability distributions , including : hypergeometric , binomial , poisson , normal , exponential , chi - square , student ' s t , and f 6西格玛黑带应熟悉常用的概率分布,包括超几何分布、二项式分布、泊松分布、正态分布、指数分布、卡方分布、学者t分布和f分布。