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MATH 170E · Lec 3

Introduction to Probability and Statistics 1: Probability

Fall 2026Yin, J.4 units

Seats, time, final and grades

Seats

Closed.

80 of 80 enrolled, lecture and all discussions summed.

Meets

MWF 3:00pm-3:50pm

Lecture only. You also attend a discussion, listed below.

Final

Thu 10 Dec, 6:30pm to 9:30pm

One exam for the whole class, Los Angeles time.

Read 38 hours ago.

Grades

3.22
predicted, this instructor · 80 grades

80 letter grades, Yin, J..

Read 3 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

dibs has seen this section open 4 times since 17 August. The last time was 27 August. 2 of those were readings where the capacity figure moved and the enrolled count did not, so dibs could not tell whether a seat existed and did not send an alert.

Enroll on the registrar (opens in a new tab) Sign in to watch for an opening

Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.

Put this class on a board

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

Tell dibs what you have already taken and this line will say which of these you have. Your list.

From the registrar limited early, then open

Information on the Mathematics Diagnostic Test and Advanced Placement (AP) credit is available at https://uclamathugrad.zendesk.com/ . There will be two MANDATORY midterm examinations from 6 to 7:50 p.m. on the following Thursdays: October 22 and November 19, 2026. Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m.

The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet.

Restrictions read 38 hours ago. dibs re-reads these slowly because they rarely change; watch the section and it moves to every 6 hours.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

2 discussions, none open. Its waitlist is full too, at 6 of 6.

No discussion is open. Whatever the lecture reads, there is currently nothing here to enroll in.
  • Dis 3A

    T 3:00pm-3:50pm

    Gluchowski, M.

    Closed.

  • Dis 3B

    R 3:00pm-3:50pm

    Gluchowski, M.

    Closed.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MWF 3:00pm-3:50pm

Mathematical Sciences 5200

Grades

3.22
predicted, this instructor · 80 grades

Of the 19 other people in the grade record for MATH 170E, the 2 with the most grades: JEONG, HALYUN at 3.63 over 336 grades and BAEUMLER, JOHANNES at 3.24 over 271 grades.

A range
51%
P/NP
0%
D/F/W
6.3%

Full grade history for MATH 170E

What students say

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

dibs has read this course’s reviews and none of them say what kind of work it sets, so dibs has nothing to show rather than a guess. Read from 120 reviews 26 days ago. That is the reviewers being silent, and not a course that sets no work.

MATH 170E reviews for Jun Yin Reviews for all professors of MATH 170E

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 5721F
  • 4922W
  • 3822S
  • 11322F
  • 6323W
  • 11323S
  • 3823F
  • 13224W
  • 4024S
  • 7024F
  • 8225W
  • 5025S
  • 6425F
Enrollment by term: 21F 57, 22W 49, 22S 38, 22F 113, 23W 63, 23S 113, 23F 38, 24W 132, 24S 40, 24F 70, 25W 82, 25S 50, 25F 64

Peak 132 · most recent 25F at 64

Seats over time

Nothing read since 2 Oct, 3 hours ago. Over about 2 months before that, filled by 10.

4 times reopened
80 of 80 · no seats left in its discussions
17 Aug 15:079 Sep 08:492 Oct 02:32 · 3 hours ago
dibs read 168 of the 699 hours its hourly record covers, 24%, and did not look in 531. dibs had no hourly record before 3 Sep, which is the other 393 of 1092 plotted.80 of 80 enrolled at the newest reading, 3 hours ago, and no seats left in its discussions. Seats from 17 Aug 15:07 to 2 Oct 02:32, 70 to 80. dibs read 168 of the 699 hours its hourly record here covers, 24%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 531 hours dibs was keeping a record and did not reach this section. Nothing before 3 September at 00:00, where this section's record starts, has a read either way, which is 393 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 3 hours ago. It is where the line stops, not where the count is now.

Show the readings (35)
Recorded Enrolled Capacity Status Waitlist Hours read
2 Oct 02:32 80 80 closed 6 of 6 12 of 41
30 Sep 10:02 80 80 closed 6 of 6 2 of 5
30 Sep 06:32 80 80 waitlist 5 of 6 22 of 75
27 Sep 04:12 80 80 closed 6 of 6 2 of 5
27 Sep 00:02 80 80 waitlist 5 of 6 2 of 5
26 Sep 20:32 80 80 closed 6 of 6 2 of 4
26 Sep 17:02 80 80 waitlist 5 of 6 6 of 19
25 Sep 23:32 80 80 closed 6 of 6 2 of 4
25 Sep 20:02 80 80 waitlist 5 of 6 71 of 249
15 Sep 12:42 80 80 closed 6 of 6 55 of 299
3 Sep 02:40 80 80 closed - 2 of 4, 1 no hourly record
2 Sep 23:40 77 80 open - no hourly record
2 Sep 20:40 77 78 open - no hourly record
2 Sep 16:40 77 80 open - no hourly record
2 Sep 10:40 77 78 open - no hourly record
2 Sep 09:40 77 80 open - no hourly record
1 Sep 02:40 77 78 open - no hourly record
31 Aug 23:40 75 76 open - no hourly record
31 Aug 22:40 75 78 open - no hourly record
31 Aug 21:40 75 76 open - no hourly record
31 Aug 19:40 75 78 open - no hourly record
31 Aug 17:40 75 76 open - no hourly record
31 Aug 15:40 75 78 open - no hourly record
31 Aug 13:40 75 76 open - no hourly record
31 Aug 12:40 75 78 open - no hourly record
28 Aug 01:40 75 76 open - no hourly record
27 Aug 22:40 74 76 open - no hourly record
27 Aug 21:40 76 76 closed - no hourly record
27 Aug 20:40 74 76 open - no hourly record
27 Aug 19:40 76 76 closed - no hourly record
27 Aug 09:40 74 76 open - no hourly record
21 Aug 20:40 74 74 closed - no hourly record
21 Aug 13:40 73 74 open - no hourly record
18 Aug 19:40 73 73 closed - no hourly record
17 Aug 15:07 70 73 open - -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

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.

Class chat

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