![Chi-square tests for proportions in one-way tables](https://blogs.sas.com/content/iml/files/2018/09/FreqTestp4-640x336.png)
Programmers on a SAS discussion forum recently asked about the chi-square test for proportions as implemented in PROC FREQ in SAS. One person asked the basic question, "how do I test the null hypothesis that the observed proportions are equal to a set of known proportions?" Another person said that