デューク大学（Duke University） による Data Science Math Skills の受講者のレビューおよびフィードバック

This course is very strong with respect to presenting the concepts you need to know for data science. It is extremely WEAK in terms explaining those concepts. If you are like me and did this kind of math back in the 70's and 80's but have not used it since, be prepared to seek sources outside Coursera in order to understand the material and pass the quizzes. The instructors leave out explanations and skip important points leaving you confused about the concept.

Example: In the Permutations and Combinations sections, "results" of calculations are thrown at you with no explanation of how the instructor got the answer. 10 minutes later, totally as an aside, you get the explanation. The course is not taught in such a way that A leads to B, B leads to C, and C leads.....; instead the instructor will tell you about C, might explain A, and forget about mentioning B until the graded quiz. That is why you will need to fill in the gaps using websites like betterexplained.com or kahnacademy.com.

The student is better served by looking at the syllabus and then going to either of those sites - where the explanations are worth your time.

In addition to failing to present steps in a logical order, the course often teaches at an extremely basic level but tests at a much, much higher level. Again, to get to the higher level of understanding needed to pass ANY of the required, graded quizzes, the student will need to heavily utilize outside sources. The explanations on the practice quizzes also fail in many cases to thoroughly explain why an answer is correct.

Then there are the issues with Coursera itself, the course navigation using Chrome is quite bad. If I did not constantly monitor what part of a course I should be in versus what part of the course automatically loaded next, I often found myself taking a quiz for which no lectures had been presented. The TA's response to my complaint was flippant and WRONG. She then closed my question and I could not respond or ask for more details.

If I had it to do over again I would invest my time and money somewhere else. In my opinion, Coursera should rescind the instructors' rights to charge for this course until the instructors improve and meet higher teaching standards.

For newbies, the set theory, real numbers, basic statistics and so on are quite well explained. The intro to probability, however, is shallow and quite confusing. It lacks some real-life examples to offer a better grasp of the theory. Coins and dices examples are a good start, but made up examples without a real base are not clarifying at all.

Week one starts with interesting material that relates probability to data science. Unfortunately as the course progress the course material and videos become less and less helpful. Ultimately the student has to visit other web sites and youtube to actual learn the expected material. The course notes are next to useless and the video are equally unhelpful. I am sure the teachers know their stuff but they have no idea on teaching it clearly based on the material presented in this course. Avoid this course, and head over to KhanAcedemy and complete their probability and statistics program and you will actually learn all the material in this course with a ton of examples and top class videos.

Difficult content not explained well by the presenters.

amazing! i love this course

Very good informative, surely has helped me understand probability more intutively.

Thanks a lot! It's a huge important course, really... Thanks. Because I want to become a data scientist, so thanks, again.

Effective way to refresh and add the Data Science math skills! Thanks a lot! At the time of the study some of the quizzes content were not rendering correctly on mobile devices (both iPad and Android)

I love the way teacher, teach me.

Learned a lot from this course, thanks :)

Thanks for sharing the course details and subsequently facilitating the course.

Excellent course. Very detailed explanation of concepts.

Some quiz answer UI mistakes. Doesn't display the correct answer.

It's very good to learn this course, so amazing.

Great course to learn basic math. It focuses on the essential and it is very clear.

The probability part is worth learning。

exactly what I need. not too hard, not too hot~

I loved the tag team between the two professors. I would love to learn more math and data science from both of them!

This course is really helpful to data science student.I was very weak in probability and statistics but this course really polish my skills.

it gets quite challenging at the end but its a good refresher. like the pdf helpers a ton!

I don't quite understand the last chapter about probability. Please use more examples like in quiz to demonstrate the concept one by one. Thanks for making education free to all of us.

Very helpful

great course and good basics for anyone starting in Data science highly recommended

A Basic Introduction to Function Graphs and Probability. To ace data science interview (Math part), I feel the content is not enough.

Good!