This class wasn't too difficult if you've taken any form of stats before. Only a few of the concepts were new to me since I've taken AP Stats. The lectures are honestly really confusing, and watching her explain concepts that I already knew had me more confused after lecture. I did keep watching lectures just to see her examples, but I'd solve them on my own for practice instead of watching her do it. If her lectures weren't recorded I probably wouldn't bother watching them since they need to be sped up/skipped through to be worth it. The homework is graded easily and the exams are pretty fair.

After seeing all her previous reviews I decided to stand out and make a comment.
I think she deserves better scores than it shows, I would say she is at least an average or above-average professor. Yes, she has an accent, but she is very helpful and caring. She always answer students questions with patience.
Her midterm is very easy, and her final is kind of tough, but doable. My recommendation is to make sure to complete all her previous final/midterm exams and study at the homework for sure. Lots of questions on the exam are taken directly from the homwork/previous exams. Getting familiar with those exams and homeworks is the key to success in this class.
I would recommend taking her class.

Having prior stats knowledge from AP Stats or Stats 10 definitely will help you out in this class. Her lectures are helpful if you have no stats knowledge, otherwise, I'd recommend saving time by taking notes directly from the lecture PDFs that she posts. The midterm is relatively easy, but for this quarter it was open-notes and online. Definitely study for it still by going through the past year's midterms and reviewing homework. The material after the midterm gets extremely difficult as there is some integral work and calculus involved. The final is extremely hard and is often the reason why she curves the class. I recommend extensively studying the finals from past years, even though she says it will be like the homework. It was a time crunch and the first in-person exam for many people which will likely cause the average to be super low. She takes quite literally forever to enter the final grade. We had the scantron exam literally the first Saturday of Finals Week and it is currently the last day grades are due but she has yet to upload them. This is causing many that are enrolled in Econ 103L to be super stressed as it is a pre-req. Overall, the class is very do-able and her notes are somewhat helpful but I am sure there are better teachers out there.

Do not take this class. While Professor Sheng is a knowledgeable woman, she is quite poor at conveying any of that knowledge in a useful way for the exams. The midterm for this class was fairly easy, with an average in the 80s while I earned a 90%. The final, however, was honestly the hardest test that I've ever taken. I got a 46% on it and the average was a 60, and because the class is graded on a curve relative to peers, I got a C+ in the class. Her lectures are incoherent, with her lack of charisma and thick accent making her very difficult to understand. If you can avoid her, I strongly recommend it.