ECON 41
Probability and Statistics for Economists
Description: Lecture, three hours; discussion, one hour. Enforced requisites: Mathematics 31A, 31B, with grades of C or better. Not open to students with credit for former Statistics 11. Introduction to theory and practice of mathematical statistics with emphasis on its use in economics. Introduction of basic statistical concepts such as random variables, probability distributions, estimation, confidence intervals, and hypothesis testing. Letter grading.
Units: 4.0
Units: 4.0
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Most Helpful Review
Summer 2025 - The pace of the course was nice despite it being a Summer class. Professor has good slides and uses good examples. Weekly homework graded on completion, not correctness. Answers posted after the deadline. Midterm was fairly easy, most people thought it was bad, but if you study you should be okay. Final was harder, so I suggest studying very hard. Professor posts past exams that are extremely helpful. Use those to study because they are similar. In previous classes it was 25-30 different questions, but for Summer 2025 Session A, the questions were dependent on each other, ex: Questions 1-5 were related to each other - similar to 1a, 1b, 1c, and so on. Her office hours are a hit or miss depending on who is there with you, but she is always there to answer questions. Good communication, and a fantastic teacher.
Summer 2025 - The pace of the course was nice despite it being a Summer class. Professor has good slides and uses good examples. Weekly homework graded on completion, not correctness. Answers posted after the deadline. Midterm was fairly easy, most people thought it was bad, but if you study you should be okay. Final was harder, so I suggest studying very hard. Professor posts past exams that are extremely helpful. Use those to study because they are similar. In previous classes it was 25-30 different questions, but for Summer 2025 Session A, the questions were dependent on each other, ex: Questions 1-5 were related to each other - similar to 1a, 1b, 1c, and so on. Her office hours are a hit or miss depending on who is there with you, but she is always there to answer questions. Good communication, and a fantastic teacher.
Most Helpful Review
Fall 2018 - Worst class I have ever taken at UCLA. Went every lecture at 8am, went to every discussion, did the homework problems and still got a failing grade. I have never felt so dejected in a class. Prof Hahn really expects you to master the concepts that he went through only once. I'd say you can only do well in his class if you put in 3 times the amount of effort you put into an average class. He also speaks quite condescendingly when you ask him about material from the lecture and replies you with yea I went fast because you should have already known and read this before. Lectures were okay but did not explain some concepts well. The exams were a horrendous time crunch and it was all MCQ so you don't get partial credit for work done if you don't arrive at the correct final answer. You don't have time to think, once you read the question you should have the entire solution in your head. I read the reviews on here and thought that it was an exaggeration but the exams are actually horrible. Overall, unless you have a strong background in stats or are willing to put in extra effort, I would not recommend taking ECON 41 with this professor.
Fall 2018 - Worst class I have ever taken at UCLA. Went every lecture at 8am, went to every discussion, did the homework problems and still got a failing grade. I have never felt so dejected in a class. Prof Hahn really expects you to master the concepts that he went through only once. I'd say you can only do well in his class if you put in 3 times the amount of effort you put into an average class. He also speaks quite condescendingly when you ask him about material from the lecture and replies you with yea I went fast because you should have already known and read this before. Lectures were okay but did not explain some concepts well. The exams were a horrendous time crunch and it was all MCQ so you don't get partial credit for work done if you don't arrive at the correct final answer. You don't have time to think, once you read the question you should have the entire solution in your head. I read the reviews on here and thought that it was an exaggeration but the exams are actually horrible. Overall, unless you have a strong background in stats or are willing to put in extra effort, I would not recommend taking ECON 41 with this professor.
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