STAT 221Statistics (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.
Empirical problem solving, measurement systems, causal relationships, statistical models, estimation, confidence intervals, tests of significance.
Prerequisites
- Complete all of the following
- Must have completed at least 1 of the following:
- Must have completed at least 1 of the following:
Antirequisites
Leads to
Fall 2026 sections
| Section | Class | Enrolled | Meets |
|---|---|---|---|
| LEC 001 | 6285 | 25 / 50 | MWF 15:30–16:20 |
| TUT 101 | 6531 | 25 / 50 | W 10:30–11:20 |
| TST 201 | 6532 | 25 / 50 | Oct 6 16:30–17:50 Nov 17 16:30–17:50 |
Winter 2027 sections
| Section | Class | Enrolled | Meets |
|---|---|---|---|
| LEC 001 | 5583 | 0 / 40 | MWF 12:30–13:20 |
| LEC 701 | 2218 | 22 / 9999 | Online or by arrangement |
| TUT 101 | 5584 | 0 / 40 | Jan 18 14:30–15:20 Feb 1 14:30–15:20 Feb 15 14:30–15:20 Mar 1 14:30–15:20 Mar 15 14:30–15:20 Mar 29 14:30–15:20 Apr 12 14:30–15:20 |
| TST 201 | 5702 | 0 / 40 | Feb 5 16:30–18:00 Mar 12 16:30–18:00 |
Reviewed on UW Flow
70% liked it72% easy91% useful
From 10 ratings and 2 comments on UW Flow. The most helpful comments, quoted as written, without names. Read them all on UW Flow.
love love love this course!! ilham is so nice and gives you so many pointers on what will be put on assessments so you can do better. the r assignments are also easy 100s to boost your grade, and final exam is really similar to the practice one given
Apr 2026 · liked itOn UW FlowRemove this
reasonable course. im a bio major with math minor and i chose to do this instead of 231 bcz 231 is hell. ilham was the prof, pretty clear explanations, does lots of practice examples in class which are very representative of quiz and midterm questions. 3 tutorial quizzes, 2 midterms, and a final. quizzes prepare you well for exams, though time management was more important for quizzes than midterms (for me).
its stats so idk if i'd say it was fun but it wasnt a snorefest and it wasnt hard so i'd recommend it, especially if it gets you out of 231Apr 2026 · liked itOn UW FlowRemove this
Discussed on r/uwaterloo
44 posts and comments in 35 threads mention STAT 221, October 2012 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.
Spring 2023
STAT 221 Content Delivery? 1 point, 0 comments
u/Jenaxay: “I was wondering how the STAT 221 course is delivered. I saw on UW Flow that there are MWF lectures, Tutorials, and Test dates listed. Are there Mobius lessons that cover the same topics covered in class? Are the tutorials necessary/part of your final grade? …”
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 221 vs Stat 231 4 points, 5 comments
u/ProuddCloudd: “… Is Stat 221 less proofs? I obviously want to take the easier one but if they're the same then I'll just do stat 231 since stat 221 isn't offered this term. edit: I switched out of math. …”
Winter 2023
What's an easy math course offered in the spring 4 points, 19 comments
“I'm an alumnus of UW currently in teacher's college and I need to take one math course in the spring. I just want to take the easiest one possible and ideally online. …”
u/1000Ditto: “try https://uwflow.com/course/STAT221”
Spring 2022
Profs to be avoided? 5 points, 46 comments
“Comment down on some of the worst and best profs you had before the new year starts. I'm trying to see if I have any professors on either ends of the spectrum. …”
u/ClassIn30minutes: “Avoid Struthers for Stats 231/221”
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 2022
tutor for STAT 221 despretoooo 1 point, 2 comments
Spring 2021
Math/CS Courses with no Final 1 point, 1 comment
u/kxxstlx: “Out of the following courses, if anyone has taken these and knows the grade breakdown/difficulty/workload I would greatly appreciate it. Trying to take courses with no final. STAT221, CS370, CS 338, AMATH343, PMATH320/330, CO327”
Fall 2020
STAT 221/231 Midterm grades 5 points, 5 comments
u/aakmar: “Hi, So the professor posted that the grades for the midterm would be out today at 9 p.m. but I don’t see anything. I followed the instructions in the announcement to check my grade. Can y’all access it?”
What's the deal with STAT 231? 70 points, 25 comments
u/Vincent_MathCouncil: “… If you've taken a similar course such as STAT 221/241 and think it went well then please also share your experience with those courses so that we have a reference for a good Waterloo intro to statistics course.”
Looking for a math tutor because christ I'm failing a required course. Yes. I will pay money. 7 points, 7 comments
u/Laeriana: “I'm assuming this is for SOC/LS 280 correct?”
u/Laeriana: “… I would recommend searching for tutors that specify they can tutor for courses like STAT 202, STAT 220/230/240 and STAT 221/231/241, as those courses are more commonly tutored for and have significant content crossover with SDS 250R (from what I can tell of the one publically …”
Statistics options for science students 1 point, 3 comments
“As the title says, I was wondering if there were any courses that went into statistics and would be open for a science student to take. I'm in 3rd year chem, and I've already taken STAT202. …”
u/Laeriana: “… stats courses (like STAT 321, 322, 337, etc.) that I know of require at least STAT 220 and 221, of which 202 is an anti-req of 220 and you may not be let in to 221 as a result. …”
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