I got them for free on Coursera. It's just that you have to finish them quickly in the span of two to three months. Since I skipped ML and went directly with DL (ANNs), I have some gap in my mind, especially on statistical techniques.
@yogthos@velox_vulnus No one asked so I apologize for interjecting 🙈 but Harvard’s CS181 course has a lot of good material free online I think. I strongly recommend those problem sets to get into the parts of stats most relevant to ML.
STAT110 is also online with even more material I think but is way more general and non programming-y.