The article discusses how statistical methods are used in Data Envelopment Analysis (DEA) to measure the efficiency of different organizational units. DEA helps compare the performance of these units by looking at their inputs and outputs. Over the years, statistical techniques have been applied in three main ways: to prepare data, as an alternative method to calculate efficiencies, and to analyze the relationship between efficiency and environmental factors. The study explores various statistical methods like tests, correlations, regressions, and bootstrapping in the context of DEA. Examples from previous research show how these methods have been used to analyze efficiency in different situations.