STAT 220Probability (Non-Specialist Level)
- Units
- 0.50
- Faculty
- Mathematics
- Subject
- Statistics
When it runs
- F24
- W25
- S25
- F25
- W26
- S26
- F26
- W27
- S27
Ran in 5 of the last 7 terms. Winter 2027: scheduled, 2 lecture sections. Spring 2027: schedule not out yet.
The laws of probability, discrete and continuous random variables, expectation, central limit theorem.
Prerequisites
Antirequisites
Leads to
Fall 2026 sections
| Section | Class | Enrolled | Meets |
|---|---|---|---|
| LEC 001 | 6014 | 24 / 40 | TTh 10:00–11:20 |
| TUT 101 | 6015 | 24 / 40 | T 11:30–12:20 |
| TST 201 | 6529 | 24 / 40 | Oct 8 18:30–19:50 Nov 12 18:30–19:50 |
Winter 2027 sections
| Section | Class | Enrolled | Meets |
|---|---|---|---|
| LEC 001 | 5782 | 0 / 40 | TTh 10:00–11:20 |
| LEC 701 | 2261 | 17 / 9999 | Online or by arrangement |
| TUT 101 | 5783 | 0 / 40 | M 13:30–14:20 |
| TST 201 | 5784 | 0 / 40 | Feb 5 16:30–18:00 Mar 5 16:30–18:00 |
Reviewed on UW Flow
83% liked it57% easy93% useful
From 18 ratings and 2 comments on UW Flow. The most helpful comments, quoted as written, without names. Read them all on UW Flow.
pretty chill course, as long as you go to class and do the practice questions you'll be good. two midterms and a final exam. yingli was really nice and brought us treats every so often!!
Apr 2026 · liked itOn UW FlowRemove this
I'll leave a written review since this course has doesn't have any. Took this in Winter 2025 with Prof. Banafsheh Lashkari and I really enjoyed it. She explained all the concepts very clearly and we were allowed cheat sheets on both midterms and the final exam. The assignments were light and helped reinforced the class contents. I skipped most tutorials since it's just the TA solving practice problems and they all get posted online anyway. Despite calc 2 being a prereq there is not much calculus involved at all, just a tiny bit at the end to calculate the cdf/pdf of continuous random variables but it's not hard at all. Overall it's very possible to get 90+ in this course and it's just super…
May 2025 · liked itOn UW FlowRemove this
Discussed on r/uwaterloo
85 posts and comments in 68 threads mention STAT 220, December 2011 to December 2024. Quoted word for word, newest first; each reply sits under the post and the comment that started its branch. Search r/uwaterloo for newer posts.
Winter 2024
STAT 2X0 question 1 point, 0 comments
u/Mystery_1403: “If you have ever taken STAT220/230/240, did you cover the R chapter in class or use R for any assignments in the course? View Poll”
Spring 2023
Math electives for arts student math minor 1 point, 13 comments
“I'm doing a math minor from arts faculty with Econ major!! I have to take 3 math electives\ anything from CO, CS, MATH, MATH-BUS, .... what electives would your recommend. …”
u/OutrageousRisk1299: “If you want to take math 225 you need to take math106 and math103 if you didn't do calc in hs if you want to take math207 you need math 128,127 and 104 if you didn't do calc in hs Co you need math106 …”
u/Coca-cola-1: “That’s a requirement so I have to take that anyway😭 I have to take 3 more required courses- stat 220, 221 and cs 116”
STAT 202 vs STAT 220 1 point, 0 comments
u/PostyLee: “Hey guys, I'm trying to take either STAT 202 or STAT 220 for next term as an elective course. Which course uses R language and which one is an easier course overall? Forgive my ignorance, but do you guys have any thoughts on what I should do?”
Winter 2023
Stat231 prerequisites 2 points, 3 comments
u/applepie2200: “Hey, so I was going through the 231 prerequisites and I just want to confirm do we need a 70%+ grade in stat230 as a prerequisite or is that 70% rule only if we take stat220. Asking this since the language on uwflow is a little ambiguous. Thanks!”
u/kapgirl: “This is the prerequisite per UG Calendar: Prereq: (One of MATH 118, 119, 128, 138, 148) and (STAT 220 with a grade of at least 70% or STAT 230 or 240); Honours Math or Math/Phys students. …”
Stat 220 vs Stat 230 1 point, 2 comments
u/New_Classic1314: “Which one is better to take I would need a 70% in 220 to take upper year stuff or just a 60% in 230 for upper year which is better???”
What's an easy math course offered in the spring 4 points, 19 comments
u/sailingg: “… I wanted to take STAT 220 but I see it's not offered in the spring. I was a math major in first year so I took MATH 135, 136, 137 and 138 but then I changed my degree in second year so the only other math course I've taken is ACTSC 221. …”
u/1000Ditto: “try https://uwflow.com/course/STAT221”
u/sailingg: “Thank you but it's not offered in the spring and I can't take it anyway since I didn't take STAT 220.”
Spring 2022
Is it really doable for math students to take 3rd/4th year econ courses with minimal previous economics experience? 1 point, 3 comments
“I'm talking about courses like ECON 322, 323, 421, 423, 424, 425, 426, how hard are these for math students that haven't taken any previous economics courses or have only taken 101 and 102 but …”
u/qiqiquack: “… Mostly just new stuff taught, or intro STATS 220/221 course knowledge used. …”
Winter 2021
Difficulty of Getting a Course override for Stat 230/231 and Math 237 5 points, 1 comment
u/East_Ring: “I noticed that the pre-req requirements for stat 230 have changed (you no longer need math 135) and because of that, and the fact that I need either stat 220 or 230 for my major, I was wondering how difficult it is to get an override for that course and Math 237 for a non-math …”
Non-Specialist vs Specialist math courses for Math-Econ (BA) Student 3 points, 2 comments
“Hey everyone! I was wondering how big the learning/material gap is between non-specialist level math courses and specialist/ honours mathematics courses (you know besides they are generally tougher). …”
u/PR_36: “… For example the difference between STAT 220 and 230 is almost none whereas the difference between MATH 207 and 237 is significant. …”
Fall 2020
Stat 230 Crying Thread 59 points, 29 comments
u/Galaxias_neptuni: “Anyone else in stat 220 :'(”
STAT 230 crying (or maybe I just suck at this stuff) thread :( 36 points, 32 comments
“It’s gonna be mighty close without a curve rip”
u/Galaxias_neptuni: “I'm in stat 220............ looks like I'm bout to die Btw which topics were more important?”
STAT 230 instructors sent a link to nominate them for "Best Online Course" or something 30 points, 20 comments
“I nominated another course B)”
u/hopper-g: “wait where’s the link”
u/tendstofortytwo: “Oh damn okay. https://uwaterloo.ca1.qualtrics.com/jfe/form/SVeESwN2kR0N39CS1?course=STAT220STAT230081cel1209”
Check it elsewhere for Fall 2026
- Undergraduate Calendar, 2026–27The official entry
- Requirements for Fall 2026Waterloo’s requisite checker
- Schedule of Classes, Fall 2026Instructors, rooms, live seats
- Quest Class SearchWhere you enrol
- Course outlinesSyllabi from past terms (UW login)
- UW FlowStudent ratings and reviews
- WClassesPast sections back to 2004, and who taught them