Hi:
When we teach the in-person classes for the SAS Academy of Data Science, we teach them in the order you see them in Module 1. You can, of course, elect to study the classes, in any order you choose.
You might want to look at the content guide for exam 1, here:
https://www.sas.com/content/dam/SAS/en_us/doc/other1/certification/exam-content/big-data-exam1.pdf where you can see that ANOVA and Regression topics represent 30% of the first Big Data exam.
My recommendation would be that you cover the Statistics 1 topics before you attempt to work in the Case Studies.
Hope this helps,
Cynthia