I took mike's stats 20 before, mike is very nice, especially on curving. I was glad that I took his 102A, but unfortunately we had a WORSE TA. In my session, 50% hw, 10% midterm, 10% midterm project, 15% final exam, 15% final project, 0.5% campus wire for extra credit.
I do not know why and how can one TA do so much stuff. If you have JAKE as TA, drop the class. JAKE is the WORSE TA I have ever met in UCLA. felt like JAKE made all the hw, and hw never matched the lecture, they were not on the same level, it just like prof. teach you how to calculate 1+1, and the hw ask you to take the partial derivative of the function. Midterm project, final project tough. The midterm was super TOUGH, within 50 mins, undoable questions. Final was better than midterm but still TIOUGH and not related to the lecture.
I felt sad that I did not hear JAKE before 102A, if I know he is this kind of person, I would drop the class immediately. TRUST ME.

Mike is one of the best Prof in the Stats Department. Unfortunately, this class is ruined by the TA "Jake". If you ever have this person as a TA, just drop the class, he is terrible. I totally agree with the comments below.

I took this class in summer 2019, the slides he used was very clear and easy, but the homework was really unfairly hard and the tests were tough. It's impossible for a student who just finished stats 20 to write two games and other homework like that. I think the TA JAKE made up the homework, he just wanted to show how talented he is. Avoid this professor and the TA JAKE. If you can, just change the major.

Professor Tsiang and Jake reformed the Stats 102A class to be more rigorous and engaging. We created a battleship project with a custom AI from scratch and even made a package in R (a combination of all our homeworks). I learned a lot in advanced R programming and am thankful for the hours the Professor and Jake put in to clarify any confusion I had. Tough class but learned valuable concepts in writing clear, concise, and effective code

The assignments were extremely time consuming AND quite difficult- even for someone with significant programming experience outside of R. However- they were so satisfying to complete, and taught me so much that I couldn't get from reading notes or a textbook.