Introduction to Probability and Statistics 1: Probability

Grades

3.23

Average grade awarded in MATH 170E. Not a rating: this is what the grades were. i The mean of every letter grade the registrar has published for this course, pooled across every instructor who has taught it. Not a student rating: this is what the grades were. It is not shrunk toward anything, because a course average cannot be pulled toward itself. Standard error 0.013.

The registrar's own records: 2,432 grades over 15 terms, Fall 2021 to Fall 2025, summer excluded. Every instructor is pooled here. The table below splits them, and term averages across those 15 terms ran 2.80 to 3.80.

By instructor

“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.

dibs measures outcomes: grades, seats, how fast a class fills. For what a class is like to sit in, BruinWalk has the reviews.

Reviews for MATH 170E ↗

What comes first

The chain dibs can see is 4 courses long before MATH 170E. dibs has read a class page for every course in it.

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

dibs has not read the registrar's description for this course. It reads them for general education courses only, so this says nothing about the course. Any section below links out to the registrar, where the catalog text is, and that text is also where a prerequisite the structured list does not carry would be written.

Sections in Fall 2026

You enroll in the discussion, not the lecture, so a discussion's status is the one that decides whether you get in. A lecture can read open while every discussion under it is full.

Seat counts as of 02 Sep 00:43: the oldest of these 9 readings. The registrar publishes hourly and dibs reads what it can each hour, so a row can be older than that.

• Lec 1 MWF 8:00am-8:50am

  Closed

  Lopez Rivera, P.

  2.81

  this instructor · 73 grades

  80 of 80 enrolled high risk i A guess about whether this will still be here at your enrollment pass, from how full it is now and how fast classes like it have filled before. Seat risk is a prediction and seat status is what the registrar said: they are two things, and this page keeps them apart.

  The requisites table warns you should have taken MATH 32B Mathematics 32B (min D-), prerequisite, warning only

  2 discussions, none open. There is no waitlist either, so the only way in is somebody dropping the lecture.

  › Every discussion, with its time and seats (2)

  • Dis 1A

    T 8:00am-8:50am · Geology Building 6704

    Closed

    40 of 40 enrolled

  • Dis 1B

    R 8:00am-8:50am · Geology Building 6704

    Closed

    40 of 40 enrolled

• Lec 2 MWF 9:00am-9:50am

  Open

  Butson, D.

  3.18

  this instructor · 131 grades

  15 seats left. 63 of 78 enrolled medium risk i A guess about whether this will still be here at your enrollment pass, from how full it is now and how fast classes like it have filled before. Seat risk is a prediction and seat status is what the registrar said: they are two things, and this page keeps them apart.

  The requisites table warns you should have taken MATH 32B Mathematics 32B (min D-), prerequisite, warning only

  2 discussions, 1 open: Dis 2A, T 9:00am-9:50am.

  › Every discussion, with its time and seats (2)

  • Dis 2A

    T 9:00am-9:50am · La Kretz Hall 120

    standing limit limited by standing: New Transfers Only: restrictions read 37 hours ago, old enough that alerts on it are held
    Open

    15 seats left.

    23 of 38 enrolled

  • Dis 2B

    R 9:00am-9:50am · La Kretz Hall 120

    Closed

    40 of 40 enrolled

• Lec 3 MWF 3:00pm-3:50pm

  Open

  Yin, J.

  3.22

  this instructor · 80 grades

  1 seat left. 77 of 78 enrolled high risk i A guess about whether this will still be here at your enrollment pass, from how full it is now and how fast classes like it have filled before. Seat risk is a prediction and seat status is what the registrar said: they are two things, and this page keeps them apart.

  The requisites table warns you should have taken MATH 32B Mathematics 32B (min D-), prerequisite, warning only

  2 discussions, 1 open: Dis 3A, T 3:00pm-3:50pm.

  › Every discussion, with its time and seats (2)

  • Dis 3A

    T 3:00pm-3:50pm · Mathematical Sciences 6229

    standing limit limited by standing: New Transfers Only: restrictions read 37 hours ago, old enough that alerts on it are held
    Open

    1 seat left.

    37 of 38 enrolled

  • Dis 3B

    R 3:00pm-3:50pm · Mathematical Sciences 6229

    Closed

    40 of 40 enrolled

Final enrollment, averaged across each term's sections: between 38 and 132 a term over 13 terms, summer excluded, most recently 64 in Fall 2025. That is the shape across years, not this term, which is above.

Seats over time in Fall 2026

How each lecture has filled since dibs first saw it. This course runs 3 lectures; the legend under the chart picks one.