I think Professor Chen is a great professor and I would definitely recommend taking Stats 13 with him! He's very passionate about the material and is great at teaching and explaining. You have to watch every lecture and every week (at least for summer) there's a set of homework problems, a coding lab, and a quiz due. The workload is manageable (just don't leave it all until the end of the week!) The quizzes, midterm, and final exam were all straightforward and reasonable. Overall the class isn't difficult and relatively straightforward, take this class with Dr. Chen!

Professor Chen was super clear and helpful the entire 5 weeks of this class. You're definitely missing out if you don't take this class with him! He's pretty funny, very engaging during lecture, and incredibly passionate when it comes to teaching stats. Quizzes and the final were definitely fair and were often slightly more difficult than the homework problems assigned (when it came to conceptual questions which came up pretty often). Professor Chen also gives out solutions to most of the homework problems assigned which is great since some of them can be very tricky. My TA for the labs walked us through the coding in discussion which also eased our workload by quite a bit. Overall, this class was pretty chill and if you have the chance, definitely take other classes with Professor Chen!

** The quarter I took this class was partially online due to Covid reasons, your experience may be different**
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Overall, Miles Chen is a pretty good, clear lecturer. This class as a whole is also just about a useful topic in general too, and what you learn here should help jumpstart your knowledge toward data analyst and data science positions, so overall I think it's a good class to take. Note, however, that because there are pre-requisite Stats courses before this one, there's much less guidance compared to, say, Stats 20 (at least this was my experience). As someone who wasn't a very experienced programmer compared to some of my peers, I think I struggled a bit more than I'd like to admit during my time in this class.
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The grading scheme was as follows:
15% Lecture Viewing Quizzes
20% Datacamp Homework
36% Homework
25% Final
4% Campuswire Participation
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Viewing quizzes, Datacamp, and Campuswire were basically free points, please do NOT forget about and waste them! Lecture-viewing quizzes weren't class content related, they were random letters, so if you're a data science expert you can't just skirt the quizzes. Datacamp was based on completion and was easy because there are tutorials on there, and Campuswire you just needed to get 150 points, plus an opportunity for extra credit if you went further (I think to 200?). Also, the premium subscription to Datacamp that you get for this class is valid for 6 months, so you can basically keep using it the quarter after you take this class which is excellent.
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I mentioned before that you have to be more proactive and independent in this class compared to your other Stats lower divs and I think the homework reflects this. The first assignment was pretty straightforward and then it got more challenging from there. Not everything was straightforward and you sometimes had to think beyond the lecture examples, which admittedly are pretty clear but don't always directly relate to the homework. That said, reading the documentation online for the different libraries/data science technologies you're using is pretty helpful as is talking things out with peers. I didn't go to office hours too often but both Professor Chen and my TA Lucy seemed quite approachable and helpful so I'm sure that's a good way to go. Also, there were a lot of issues happening on campus the quarter this class happened that caused people mental distress, so Professor Chen was kind enough to give an extension on homework to everyone at that time.
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The final was absurdly challenging and after talking with peers afterward, I don't think I was alone in not having completed the whole exam. The topics that appeared were also not what I expected; for example, there was a much bigger focus than I expected there to be on object-oriented programming. Personally, I think the final was the worst part of this class. That said, Professor Chen was pretty understanding and adjusted the grading upward on the final.
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Overall I'd take this class again with Professor Chen, and would recommend you to take it as well.

He pretty much gives you a free 20% just for completing lecture quizzes and participating on campuswire. There are 6 homeworks which are moderately difficult, but the instructions are clear so it is easy to see if you were right. Midterm is difficult but he added some points for everyone's midterm. Final much easier than midterm

Easy A. Learned nothing. I literally finished this course less than three weeks ago and I cannot remember a thing about it.

I do recommend Chen though; he's a solid human being. Which we need more of these days lol

To my own experience, I don't think this class is as hard as other people claimed it to be. Dr. Chen gave us his old exams as practice exams, and I have taken both midterm and final, so I can be sure that the difficulty in my class and the previous class is at the same level. Although Dr. Chen said that this is a coding class, Stat102A is no way compared to CS31 in which I used to spend at least 5-10 hrs or even more for each project, it may be an easier version of PIC10A. He does test some conceptual details, but he reminds students that he will do so before the test. As long as you watch his youtube lectures and take notes, and STUDY, you will be totally fine. The only thing is that I think he didn't spend enough time on numerical methods/ Randomization/Bootstrap tests (probably because it is summer). If you have taken Numerical Methods MATH151A, you will have no problem understanding the material, but if you have not, spend some more time on the internet. Otherwise, I don't really have anything to complain about Dr. Chen. Nice summer class!!!

Sure Miles comes off as great and cares about his students well being but the moment you step into office hours, it seems like he is criticizing or judging your questions. If you somehow get on his bad side, then you're stuck there. He's pretty petty and tends to take things personally. Make sure you get on his good side or he'll screw you over.

Wouldn't take a class with him, I've learned NOTHING in the 102 series.

Fantastic professor. Truly cares about is students, and tries to make the class easy for them. He tries his best to help you understand the essentials of basic statistics in a friendly, non-stressful way. With the help of AP Statistics in high school, this course was a breeze as I was able to attain an A+ with a little less than an hour of preparation throughout the quarter for his assessments in the form of quizzes, two midterms, and the final. Labs are tedious, but you gotta do what you gotta do.

Definitely recommend. Hope to see Miles Chen at UCLA for as long as he desires to be here.

Professor Chen is the best professor I have had at UCLA so far! I have never taken a stats class before and I thought I was going to hate it, but he makes the class understandable and enjoyable. He truly cares how the students are doing and makes sure every subject is clear. Tests and quizzes are exactly like what he has you practice in class and on homework. Definitely take his class if you can!

MILES ROCKS!!!!! TAKE HIM FOR ALL THINGS STATS RELATED.