AbstractStatistics and data analysis provide exciting approaches for extracting knowledge from data. Recently, statistics and data analysis were sought to be exploited in many research fields. In this study, statistics is applied to religious studies. Thirteen different orders of Quran’s revelation are considered. To start with, by using regression analysis, the similarity between these orders is investigated. The results show that all of the orders are highly related (R2 > 0.7, P < 0.001). Then, the hierarchical clustering method is used to cluster the orders.