![The CUSUM test for randomness of a binary sequence](https://blogs.sas.com/content/iml/files/2019/04/cusum1-640x336.png)
Many statistical tests use a CUSUM statistic as part of the test. It can be confusing when a researcher refers to "the CUSUM test" without providing details about exactly which CUSUM test is being used. This article describes a CUSUM test for the randomness of a binary sequence. You start