I give him the same grade as the averages for our exams. An F. I don't think he was mean, just extremely incompetent. After our first midterm (the average was below 50%), he sent an email out saying that he wasn't sure what happened and that we needed to work harder. I don't think he could've gotten a passing grade on it. He pulled the most niche statistics dilemnas out of no where, because none of the stuff was in our textbooks. There is no assigned homework, so there's no feedback on how you're doing before you get railed by his tests.
Here is a summary of everything leading up to our impossible final:
1. He sends out an email a few days before saying that he realizes his lecture notes are incorrect and that we need to correct them via the book. He didn't bother correcting his pdf notes, but just threw it on us last second. It was wonderful trying to go through all of our notes for the quarter fixing over 10 significant mistakes (was completely copying down formulas wrong).
2. He says in our last lecture that we can use devices and open book because the exam will be very difficult. Of course, everyone decides that they will use their devices and don't need to prep as much or invest in a physical book (since everyone had the pdf). Then, two days before the exam, he cancels the device policy and says nevermind, just bring your book. I luckily was able to scramble and find a book last second, but most everyone couldn't get one in time and had to just correct their notes in limited time (again, because they were from him and wrong).
3. We go in, and proceed to get several problems that had no information on how to solve from the book. A book written by statisticians did not have the resources to answer the questions. I genuinely think he was just proud of his advanced stats research and gave us problems he solved to flex on us.
So, summarizing, I give him an F. He seems like a lovely guy, just seemed completely oblivious to how a class should be run. This class should not have been the hardest math upper division I've taken by far, but he managed.

Avoid this professor. All other reviews for 170s were during online quarters due to COVID, ie 24 hour exams. I took this class fully in person with timed exams, and I would say it is the worst math class I have taken here (even compared to math 115a in person). The grade is only composed of quizzes and exams, where quizzes are 24 hour and easy, but do not reflect difficulty of exams and are very surface level. The first midterm and the final were completely unreasonable in terms of difficulty. The mean for midterm 1 was around 50. He gives optional homework which are just book problems and does not provide any solutions or explanations to check with, so if you don't have Chegg you are out of luck. His lectures/lecture notes are just the textbook summarized and often contain errors in formulas. Even if you were to solve all textbook problems (as he recommends for outside study) you would not be prepared for his exams. He also does not plan to curve the course at this moment (I am still waiting for my grade). It is just appalling that this lazy professor managed to make a class which is normally regarded as one of the easiest math upper divs a complete nightmare.

Professor Ozel is the best math professor I have had at UCLA. He is very kind and understanding, especially during the recent events, but still maintains a strict load of coursework. His exams are designed fairly and the homework he assigns relates to it. It is clear that Ozel loves his job and loves teaching students. He spent a lot of time preparing the lectures before class and quickly adjusted to lecturing over Zoom. He pauses throughout the lecture to make sure all questions are answered and even takes time after class to address any questions anyone still has. He is a very quick responder and even spends time answering questions through email. Overall, my time at UCLA was greatly impacted by professor Ozel and I honestly wish I took every math class with him rather than some of the other professors I had. He makes ann effort to build a relationship with each student during office hours and was a great mentor when I was struggling with deciding whether or not to take the actuarial exams. He has a great teaching style and I hope that the math department recognizes how much the students appreciate him.

Professor Ozel is a great professor- very nice, helpful and gives pretty fair exams. The class itself isn't terribly difficult and is a mix between some history, and mostly the origins of math and proofs for elementary theorems and processes (like the quadratic formula). He would give optional homework, and his tests were fair/representative of homework questions. He's helpful in office hours and cares about his students. Definitely recommend him for 106 and any other math class

Amazing professor who cares deeply about the students' learning and well-being. We need more professors like Dr. Ozel, especially in the FAM major, who gives clear lectures and illustrate time value of money through various diagrams. I greatly appreciate his help and patience during OH. He grades pretty leniently on exams, which are fair and preps decently for the FM Exam.

He is a very nice professor. His office hours are helpful and he responds email very fast. Very sad that he will leave UCLA soon.
This course is not hard at all, but it does require a decent amount of effort. If you study approperiately, I do believe you will likely get the result you want as it is an applied math course and there are no proofs involved at all.

Overall, this class was fun to take and Professor Ozel is very understanding and accommodating of current circumstances. I was doing well in the class until the final, which I think is partially my fault. As another poster mentioned, there are weekly quizzes, 5 in total, and the lowest 2 are dropped. The midterm was a little tougher than the quizzes, but the average was very high, and I don't know if he overcorrected for the final but I found it brutal, but that could be because I lost all motivation towards the end of the quarter. If you stay on top of your stuff, it's a very doable class.

I took this class as an online summer class and it was definitely a positive experience. It was my first upper div and I was a bit nervous in the beginning but honestly Prof. Ozel is pretty straightforward with his lectures.

Sometimes he got ahead of me when it came to following the proofs so I would recommend watching the recording if you take it while classes are still being offered online but being there live is definitely also helpful because he always stops to answer every question before moving on. The pace was doable even with it being a 6 week summer course.

I may have been kinda way too nervous so I more or less did all of his (TONS of) assigned hw problems even though it wasn't required for submission. I'm here to say the hw problems weren't thaaat useful and if you got the concept after around 4-5 questions then you're probably in the clear.

His midterm/final don't actually follow the pattern of the hw so getting used to that pattern is not necessary. Mostly, it just makes sense to -understand- the concepts enough to be able to deal with some manipulation that you will have to do with the exam papers. I can't exactly explain it but you do have to re-read the exam questions tons of times because they're not as straightforward as the hw and you'll have to move things around sometimes. I'm actually ~impressed~ at how he managed to make the papers difficult while still being fair. The average for the midterm was around 90-something but dropped to 80-something in the final - so beware?

BUT on the bright side his quizzes were pretty straightforward and def helped boost my grade (quizzes were 20% of the grade) and cement my understanding week-by-week. He even lets you drop 2/6 quizzes so that's super helpful.

Overall, it was a super useful intro to all the different types of distributions and a really good way to see how helpful it is to understand what goes on behind the scenes with data analysis. I really liked how he explained Bayes in the context of false positives with tests like COVID one - so that's good. He even explained the famous Monty Hall problem for almost half an hour in the last class so that was super interesting and made me realize how much I'd learnt over the whole course so that's fun :)

Ozel is an awesome guy. He's a big geek and history nerd who loves including pop culture references in his homeworks and tests. He's a fairly decent teacher and often stays longer for office hours to help people out. He does not assign a lot of homework, so it can be a little easy to get complacent in his class. Overall, would recommend, but he's not staying at UCLA for too much longer.

Ozel is the best professor in the math dept. he knows the material well and cares about his students and it shows in the way he lectures. he is also very helpful in office hours and is encouraging of questions during lecture. he does give a lot of homework but it prepares you well for the exams so it is worth it to do. I highly recommend this class with ozel!