This class sucks. Professor Sanchez is extremely unclear at explaining concepts, and it's not even like you can look at the textbook for a more clear / different explanation of concepts -- she wrote the textbook herself, complete with grammatical errors and non-insightful explanations. She has you complete these ridiculously long and tedious homeworks every week, making this class have one of the toughest workloads of my quarter even though it was by far the easiest material. A couple examples of non-related and non-helpful homeworks include one where you had to record an interview of you with another student about how probability was relevant in your major and another one where we had to submit a 2-page biographical paper on a historical mathematician in the field of probability. She hands out worksheets in lecture as opposed to discussion and has you talk to group members in the middle of lecture, so you can't even skip those even though they're borderline useless. The questions she asks are usually unclear or very poorly worded, and on top of that she can be eccentric to a fault - on our timed midterm, there was a question with a link to a YouTube video of a parody of 'Someone You Loved' by Lewis Capaldi with probability models, where the question was "which probability model was not mentioned in the video?" Something that would have maybe been funny to someone with a weird sense of humor and who wasn't in the middle of taking an exam. All in all, avoid taking this class with her as you will leave it with little useful knowledge except for how to get by in a class with an awful professor.

Sanchez ... was honestly not as bad as the previous reviews make her to be. I took Stats 100A online (class format was online-asynchronous), but there were no synchronous zoom lectures I had to attend. Instead, Dr. Sanchez posts a module on Canvas every week containing the week's pre-recorded lecture videos, assignments and quizzes. The workload was fairly heavy; Dr. Sanchez's assigns plenty of weekly assignments and quizzes, and each quiz had like 20 questions. Here are the "good" and "not-so-good" parts of her class.

The good: Overall, Dr. Sanchez was very helpful. She replied to emails almost instantly, and her expectations for the most part were reasonable. The nice part was that her class is very structured (she tells you EXACTLY what you need to do every week and forces you to keep up with the material), so it was hard to fall behind. Overall, lecture videos were clear and polished.

The "not-so-good":
Workload became very heavy at times, and expectations for homework often times were unclear and vague. The Cognella active quizzes and review assignments could at times be a real time sink, since many of the assignments contained more than 20 questions, often times with multiple parts (a),(b),(c) etc. On top of that, Dr. Sanchez assigns weekly homework, which she claims helps you apply knowledge of probability to the real world. This is a fantastic idea, only that Dr. Sanchez provides very little guidance on how to obtain relevant statistical data and research papers for us to analyze. Due to her unclear and vague instructions, I wasted tons of time searching on the web for those data. Also, some of her homework feels like busy work. She once made us make a video explaining the biography of a probabilist of our choice (how is this relevant to what we're learning?).

Grading at times can be harsh, as some reviewers have mentioned. The 3-hour timed midterm was not difficult per se, but the grading was super picky. I kept losing 0.2 points per problem for "not clearly defining random variable" and "not checking assumptions for binomial."...etc. , even though I answered the questions correctly and showed work and explanation. The final was long and difficult, and I ended up not solving some of the problems due to running out of time. The averages on the exams as you can guess, were pretty bad. ~ 75 % for midterm, 60 % for final.

Overall, if you decide to take Sanchez for Stats 100A, try to take her in a quarter when you're not overwhelmed by 3-4 other difficult classes. It is definitely possible to succeed in her class, especially if you read her instructions carefully and follow them to a T on the assignments. That being said, her class is a challenge, not because of the subject matter, but because Dr. Sanchez can be strict in ways you aren't used to (including grading). Also, she said in the beginning of the quarter that a 95 is needed for an A, and 98 for an A+, but I believe she ended up curving. So don't be scared by the seemingly high expectations for an A; it is possible she might adjust the cutoffs.

This was Dr. Sanchez’s first time teaching this course asynchronously over Canvas. It was a trainwreck.

Her lecture videos were light on useful explanations and heavy on practice problems. Which is normally a good thing except she wasn’t the one doing the problems. We were. And it was all through this awful built-in quiz system on her videos that made it impossible to fast forward through them even with fancy Chrome extensions (trust me, I tried). If you get something wrong, have fun figuring it out on your own because she essentially just reads the problems aloud and moves on.

Here’s perhaps my most memorable moment in that class. We had two options for our final: a “data project” or an online open note final. Having experienced her unbelievably confusing and ambiguous midterm questions, I and many others chose to do the data project thinking it’d give us some semblance of control over our grades. I spent more time working on part one of this project than I normally do studying for a hard final. Checked my grade a week later: 50%. Highest score in the class was a 60%. WTF. Thankfully she let us change our minds at that point and switch to taking the final exam. From the grade distribution on MyUCLA it looks like almost everyone took her up on that offer. No way in hell we were gonna suffer through a second and third part of that.

I ended up getting a good final grade because of an unexpectedly nice curve. Even so, I learned very little from Dr. Sanchez herself and had a miserable first quarter back on campus primarily because of this class. If I could go back in time and redo this quarter’s enrollment, you bet your sweet bippy I would.

If possible, DO NOT take this class with Sanchez - take a different professor or the course equivalents in different departments. She is extremely unclear in all of her instructions for assignments, projects, exams, etc.

Probably the hardest class I took so far at UCLA, not necessarily because of the content but because of the workload. There are participation quizzes for every lecture, quizzes after every chapter, one midterm, and one final. She will NOT remind you when quizzes are due, so make sure you stay on top and check CCLE every day. Overall, this class is stressful but doable, and I don't recommend taking this class if your schedule is already tough.

This class was not as bad as a lot of reviews made it out to be, although I did take the class remotely. The exams were pretty much exactly like the homework, Sanchez held office hours after every lecture and responded to her email pretty quickly when I had questions. Her slides did have some typos but she corrected them as she went along. Sometimes her explanations were a bit vague but the textbook and the actual practice problems/homework, as well as the problems we did in discussion section, helped to clear things up. My main issues with this class was that there were a bunch of little assignments that we had to do and sometimes it could be hard to keep track of all of them, for example, I missed a participation quiz, but you drop the three lowest homework grades and the three lowest participation/quiz grades. My other gripe is that the midterm was three hours so we basically had two finals. Other than that, I liked the professor and I feel like I actually learned a lot in her class.

I'm glad I took this class with Sanchez. She's actually pretty nice and even though she had high expectations, it helped me be more engaged and actually really learn the material. I feel more confident going into 100B.

Prof Sanchez is kind, but very passive aggressive. If you have a drive to do all the work assigned to you, you'll be fine in this class — midterms/finals are usually based off of homework, participation quizzes, and problems done in class. However, I am NOT the kind of person who willingly does work no matter how much. The main struggle in this class is the sheer amount of work assigned, but the concepts aren't incredibly difficult if you pay attention (which I did not). Do everything (EVERYTHING) assigned (don't expect an easy A!) and you'll be fine, but doing everything assigned is the most difficult part - Sanchez routinely assigns 3-hour homework/participation almost every class.

She is the worst professor I have ever had. Even 1 is too high for this class. Avoid Sanchez !

absolutely the worst professor ever in my experience at UCLA. There are way harder classes but you can always count on Sanchez to disgust you throughout the semester. The first thing she asks you to do is to buy a 70 dollar textbook that she wrote, which did not come into use once throughout the entire class. THERE ARE PAGES OF INFO ON HOW TO BUY THE BOOK ON THE COURSE WEBSITE BUT NOTHING ON HOW TO ACTUALLY USE IT. She also punishes you for every single trivial detail you did wrong, whereas she makes typos in almost every homework and ppt, making it confusing what she wants from you in the first place. In addition, her teaching is absolutely horrible: she just reads the most basic stuff in the ppt and forces you to learn the actual hard contents by yourself by making them homework or quizzes. There is actually one time where SHE MADE US SELF STUDY 1 WEEK'S MATERIAL THAT SHE DIDN'T TEACH TO DO HER PARTICIPATION QUIZ. If you try to aim for a straight A( which btw she raised to 95 instead of 93), you'll most likely end up feeling you spent more time feeding her ego than actaully mastering the content of the class. What an insult to the teaching profession as well as the time and money students spend to get their collage education. It's amazing that she is still allowed to teach here. I've had my share of bad professors, but Sanchez just took it to another level.