STATS 100A
Introduction to Probability
Grades
3.55
Average grade awarded in STATS 100A. Not a student rating: this is what the grades were.
In the A range
67%
of the 2,470 letter grades
D, F or W
2.1%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
1%
11 of 13 students passed
The registrar's own records: 2,470 grades over 15 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
4 of those terms are summer sessions, and summer sessions are counted here.
The table below splits them, and term averages across those 15 terms ran 2.97 to 3.99.
Historical grades for all professors, across recorded terms. The course summary above includes all professors.
- A+ 300 · 12.1%
- A 1,094 · 44.3%
- A- 253 · 10.2%
- B+ 239 · 9.7%
- B 292 · 11.8%
- B- 92 · 3.7%
- C+ 56 · 2.3%
- C 69 · 2.8%
- C- 23 · 0.9%
- D+ 11 · 0.4%
- D 12 · 0.5%
- D- 3 · 0.1%
- F 26 · 1.1%
- P 11 of 2,493
- NP 2 of 2,493
- I 10 of 2,493
Percentages are of the 2,470 letter grades. Grey bars are non-letter outcomes: passes (P), no-passes (NP), and incompletes (I).
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Fall 2025 |
|---|---|---|---|---|---|---|---|
| WU, YINGNIAN reviews ↗ | 3.93 | 3.94 | 749 | 7 | 95% | very light | not teaching it |
| WANG, BINGLING reviews ↗ | 3.48 | 3.48 | 427 | 3 | 65% | very light | not teaching it |
| CHENG, GUANG reviews ↗ | 3.30 | 3.28 | 342 | 3 | 41% | average | not teaching it |
| HO, HAO reviews ↗ | 3.47 | 3.47 | 287 | 2 | 59% | light | not teaching it |
| SANCHEZ, JUANA reviews ↗ | 3.37 | 3.36 | 240 | 4 | 55% | heavy | not teaching it |
| MONTUFAR CUARTAS, GUIDO FRANCISCO reviews ↗ | 3.14 | 3.10 | 212 | 3 | 42% | light | not teaching it |
| PAIK SCHOENBERG, FREDERIC ROLAND reviews ↗ | 3.37 | 3.35 | 138 | 2 | 57% | - | not teaching it |
| DAI, XIAOWU reviews ↗ | 3.65 | 3.68 | 75 | 1 | 71% | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Work types reported in BruinWalk reviews of this course, across recorded instructors and terms. They may differ from this term's syllabus.
What the work looks like
- Exams mentioned, no number given, said by 21 reviewers
- Quizzes mentioned, no number given, said by 2 reviewers
- Papers mentioned, no number given, said by 2 reviewers
- Problem sets mentioned, no number given, said by 11 reviewers
- Group works mentioned, no number given, said by 1 reviewer
Read from 156 reviews 16 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.
What comes first
The chain dibs can see is 4 courses long before STATS 100A. Read from Fall 2026, because dibs has not read a class page for STATS 100A in Fall 2025 and a department can change what it requires. This is a floor, not a deadline: dibs has not read a class page for MATH 3B, so the real chain can only be longer than this, never shorter.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Falls
Ran in 5 of the last 5 Falls.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, three hours; discussion, one hour. Requisites: Mathematics 32B, 33A. Not open to students with credit for Electrical Engineering 131A or Mathematics 170A; open to graduate students. Students may receive credit for only two of following: course 100A, former course 110A, Biostatistics 100A. Probability distributions, random variables, vectors, and expectation. P/NP or letter grading.
Sections in Fall 2025
From the people who took it
Student reviews
What taking STATS 100A was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.