【AB测试lec6 review】AA测试，SUTVA，幸存者偏差，Heterogenous Treatment Effects，Novelty/Primacy

[视频作者] 一笼小糕

[视频时长] 71:59

[视频类型] 校园学习

Internal Validity: SRM,Randomization，Violation of SUTVA(independence:一个unit的response只和他所受到的treatment相关，与其他人的treatment无关), Survivorship Bias(不是所有在实验组的unit都接受treatment--non-random attrition from the variants) External Validity: Heterogenous Treatment Effect