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STATS 100A · Lec 4

Introduction to Probability

Fall 2026Plecko, D.4 units

Seats, time, final and grades

Seats

Closed by the department.

77 enrolled enrolled. The department published this count and no capacity, so there is no share to fill.

Meets

TR 8:00am-9:15am

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

Final

Tue 8 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 2 days ago.

Grades

3.55
predicted, all instructors · 2,470 grades

2,470 letter grades, everyone who has taught STATS 100A.

Read 1 minute ago. This is a recent reading, not a live seat count.

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

Registrar's Restrictions cell, read 2 days ago: "Undergraduate Students Only".

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

For Statistics 10 through 186, enrolling on the wait list does not guarantee enrollment in the course. A place on the wait list only offers a chance to add the course if enrolled students drop the course. 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. This class is also Undergraduate Students Only, which that date does not lift.

Restrictions read 2 days 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. There is no waitlist either, so the only way in is somebody dropping the lecture.

No discussion is open. Whatever the lecture reads, there is currently nothing here to enroll in.
  • Dis 4A

    W 9:00am-9:50am

    Pollon, M.K.

    Closed by the department.

  • Dis 4B

    W 10:00am-10:50am

    Pollon, M.K.

    Closed by the department.

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: TR 8:00am-9:15am

Mathematical Sciences 5200

Grades

3.55
predicted, all instructors · 2,470 grades

Of the 8 people in the grade record for STATS 100A, the 2 with the most grades: WU, YINGNIAN at 3.93 over 749 grades and WANG, BINGLING at 3.48 over 427 grades.

A range
67%
P/NP
1%
D/F/W
2.1%

Full grade history for STATS 100A

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.

What the work looks like

  • Exams mentioned, no number given, said by 21 reviewers
  • Quizzes mentioned, no number given, said by 2 reviewers
  • Papers mentioned, no number given, said by 2 reviewers
  • Problem sets mentioned, no number given, said by 11 reviewers
  • Group works mentioned, no number given, said by 1 reviewer

Read from 156 reviews 16 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

Reviews for STATS 100A Search the reviews for D. Plecko

Will it still be here

no history chance of closing before your enrollment pass.

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

  • 6021F
  • 6622W
  • 6622S
  • 7922F
  • 7823W
  • 6823F
  • 7524S
  • 7424F
  • 8325W
  • 7525S
  • 10525F
Enrollment by term: 21F 60, 22W 66, 22S 66, 22F 79, 23W 78, 23F 68, 24S 75, 24F 74, 25W 83, 25S 75, 25F 105

Peak 105 · most recent 25F at 105

Seats over time

Filled by 22 over about 1 month

2 times reopened
77 of 80 · no seats left in its discussions
18 Aug 18:409 Sep 19:251 Oct 20:10
dibs read 168 of the 174 hours its hourly record covers, 97%, and did not look in 6. dibs had no hourly record before 24 Sep, which is the other 885 of 1059 plotted.77 of 80 enrolled at the newest reading, 1 minute ago, and no seats left in its discussions. Seats from 18 Aug 18:40 to 1 Oct 20:10, 55 to 77. dibs read 168 of the 174 hours its hourly record here covers, 97%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 6 hours dibs was keeping a record and did not reach this section. Nothing before 24 September at 15:00, where this section's record starts, has a read either way, which is 885 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: 1 minute ago.

Show the readings (56)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 20:10 77 0 closed by the department - 19 of 20
1 Oct 01:12 77 0 closed by the department - 2 of 2
1 Oct 00:50 78 0 closed by the department - 3 of 3
30 Sep 22:30 76 0 closed by the department - 2 of 2
30 Sep 21:42 77 0 closed by the department - 1 of 1
30 Sep 21:10 76 0 closed by the department - 2 of 2
30 Sep 20:30 78 0 closed by the department - 3 of 3
30 Sep 18:50 76 0 closed by the department - 1 of 1
30 Sep 18:12 78 0 closed by the department - 3 of 3
30 Sep 16:50 76 0 closed by the department - 42 of 47
28 Sep 18:30 78 0 closed by the department - 3 of 3
28 Sep 16:00 77 0 closed by the department - 2 of 2
28 Sep 15:10 78 0 closed by the department - 63 of 63
26 Sep 01:30 77 0 closed by the department - 35 of 146, 111 no hourly record
20 Sep 00:52 78 0 closed by the department - no hourly record
19 Sep 01:20 79 0 closed by the department - no hourly record
18 Sep 23:50 80 80 closed - no hourly record
18 Sep 23:00 79 0 closed by the department - no hourly record
18 Sep 20:30 80 80 closed - no hourly record
18 Sep 18:50 79 0 closed by the department - no hourly record
17 Sep 03:02 80 80 closed - no hourly record
16 Sep 23:32 75 80 open - no hourly record
16 Sep 22:52 80 80 closed - no hourly record
16 Sep 20:02 75 80 open - no hourly record
16 Sep 16:42 74 80 open - no hourly record
15 Sep 10:52 72 72 closed - no hourly record
12 Sep 04:32 72 80 open - no hourly record
12 Sep 00:12 70 80 open - no hourly record
11 Sep 22:02 72 80 open - no hourly record
3 Sep 01:40 70 80 open - no hourly record
2 Sep 22:40 62 80 open - no hourly record
2 Sep 18:40 63 76 open - no hourly record
2 Sep 15:40 62 80 open - no hourly record
2 Sep 13:40 63 76 open - no hourly record
2 Sep 11:40 62 80 open - no hourly record
2 Sep 10:40 63 76 open - no hourly record
2 Sep 09:40 62 80 open - no hourly record
2 Sep 01:40 63 76 open - no hourly record
1 Sep 01:40 64 76 open - no hourly record
31 Aug 23:40 61 71 open - no hourly record
31 Aug 22:40 61 76 open - no hourly record
31 Aug 21:40 61 71 open - no hourly record
31 Aug 19:40 61 76 open - no hourly record
31 Aug 16:40 61 71 open - no hourly record
31 Aug 15:40 61 76 open - no hourly record
31 Aug 13:40 61 71 open - no hourly record
31 Aug 12:40 61 76 open - no hourly record
28 Aug 00:40 61 71 open - no hourly record
27 Aug 22:40 58 71 open - no hourly record
27 Aug 21:40 61 71 open - no hourly record
27 Aug 20:40 58 71 open - no hourly record
27 Aug 19:40 61 71 open - no hourly record
27 Aug 11:28 58 71 open - no hourly record
22 Aug 00:40 58 66 open - no hourly record
21 Aug 11:40 55 66 open - no hourly record
18 Aug 18:40 55 61 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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