BIOSTAT M236
Longitudinal Data
Lecture and lab.
Fall 2026: 2 lectures and 1 discussion. All of them are open. The oldest of these readings was 18 hours ago.
Also listed as BIOMATH M282 (closed by the department): the same class, and each department holds its own seats and its own grade history.
Grades
3.76
Average grade awarded in BIOSTAT M236. Not a student rating: this is what the grades were.
In the A range
83%
of the 152 letter grades
D, F or W
0.0%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
0%
nobody in the record took it pass/no pass
The registrar's own records: 152 grades over 5 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
No summer session is in that record.
The table below splits them, and term averages across those 5 terms ran 3.63 to 4.00.
Historical grades for XU, JASON QIAN, across recorded terms. The course summary above includes all professors.
- A+ 6 · 37.5%
- A 10 · 62.5%
Percentages are of the 16 letter grades. Grey bars are non-letter outcomes.
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 2026 |
|---|---|---|---|---|---|---|---|
| ZOLLER, JOSEPH ALAN reviews ↗ | 3.53 | 3.47 | 69 | 2 | 62% | - | Open, 4 seats left |
| WEISS, ROBERT reviews ↗ | 3.95 | 4.00 | 57 | 3 | 100% | - | not teaching it |
| XU, JASON QIAN reviews ↗ | 3.88 | 4.00 | 16 · | 1 | 100% | - | Open, 6 seats left |
| WEISS, ROBERT ERIN reviews ↗ | 3.85 | 4.00 | 10 · | 1 | 100% | - | 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
Reported assignments across instructors and terms. This term's syllabus may differ.
No reviews were listed in the BruinWalk source checked 7 days ago. Assignment details are unknown. Check the current syllabus.
What comes first
The chain dibs can see is 1 course long before BIOSTAT M236. This is a floor, not a deadline: dibs has not read a class page for BIOSTAT 200B, 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 2 of the last 4 Falls, so it turns up in Fall sometimes rather than dependably.
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
(Same as Biomathematics M282.) Lecture, three hours; laboratory, one hour. Requisite: course 200B or another substantial regression course. Analysis of continuous responses for which multivariate normal model may be assumed. Students learn how to think about longitudinal data, plot data, and how to specify mean and variance of longitudinal response. Advanced topics include introductions to clustered, multivariate, and discrete longitudinal data. S/U or letter grading.
Sections in Fall 2026
Choose an open discussion to enroll; an open lecture alone does not mean a seat is available.
Seat counts as of : the oldest of these 3 readings. Seat readings are snapshots, not live availability. Their timestamps show when dibs last checked.
-
Seats
Open6 seats left in discussions.
Lecture: 16 of 22 enrolled
Seat risk
high riskThis limit is on the class, so it applies to the discussion below.
1 discussion, all open.Every discussion, with its time and seats: 1 discussion
-
Open
6 seats left.
16 of 22 enrolled
-
-
Seats
Open4 seats left.
26 of 30 enrolled
Instructor
Zoller, J.A. and Zhang, Y.
3.53Predicted GPA
Historical records for ZOLLER, JOSEPH ALAN; 69 letter gradesSeat risk
medium risk
Final enrollment, averaged across each term's sections: between 12 and 38 a term over 5 terms, summer excluded, most recently 16 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking BIOSTAT M236 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.
Seats over time in Fall 2026
How each lecture has filled since dibs first saw it. This course runs 2 lectures; the legend under the chart picks one.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Lec 1 · Xu, J.Q. · 16 of 22 enrolled
Nothing read since 16 Oct, 14 hours ago. Over about 2 months before that, freed 6 seats.
Lec 82 · Zoller, J.A. and Zhang, Y. · 26 of 30 enrolled
Nothing read since 16 Oct, 14 hours ago. Over about 2 months before that, filled by 1.
How readings and alerts work
Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.