Since Wald(1947) proposed method of Sequential Probability Ratio Test (SPRT), SPRT has become an important tool for solving hypothesis test problems.

• 自Wald(1947) 提出序贯概率比检验(Sequential Probability Ratio Test；以下简称“SPRT”)方法以来；序贯方法逐渐成为解决假设检验问题的重要工具.