Stat 20 (Fall 2026)

Hex logo of Stat 20 showing a golden bear.

This Week (Week 1)

Aug 24

This Week

Aug 26

Understanding the World with Data

Tested on Quiz 1

Before class:
Notes

In class:
Slides Worksheet Lab: Getting Started

Aug 28

Taxonomy of Data (and Intro to Coding)

Tested on Quiz 1

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

More practice

Week 2

Aug 31

This Week

Quiz 1 Registration

SIGN UP starting Sep 1
Timeslots: Sep 8-11
Content: Weeks 1-2

Due tomorrow:

Worksheet Packet 0 (completed entirely on Gradescope)
Worksheet Packet 1
Lab: Getting Started

Sep 2

Summarizing Categorical Data

Tested on Quiz 1

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Class Survey

Sep 4

Summarizing Numerical Data

Tested on Quiz 1

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

Week 3

Sep 7

This Week

Quiz 1

SIGN UP
Timeslots: Sep 8-11
Content: Weeks 1-2

RETAKE of Quiz 1 Registration

SIGN UP starting Sep 12
Content: Weeks 1-2

Due tomorrow:

Worksheet Packet 2
Lab: Class Survey

Sep 9

A Grammar of Graphics

Tested on Quiz 2

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Flights I

Sep 11

Conditioning

Tested on Quiz 2

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

Week 4

Sep 14

This Week

RETAKE of Quiz 1

SIGN UP
Timeslots: Sep 14-25
Content: Weeks 1-2

Due tomorrow:

Worksheet Packet 3
Lab: Flights I

Sep 16

Summarizing Numerical Associations

Tested on Quiz 2

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Flights II

Sep 18

Data Visualization

Tested on Quiz 2

Before class:
Notes

In class:
Slides Worksheet

Extras

Week 5

Sep 21

This Week

RETAKE of Quiz 1

SIGN UP
Timeslots: through Sep 25
Content: Weeks 1-2

Quiz 2 Registration

SIGN UP starting Sep 21
Timeslots: Sep 28-Oct 2
Content: Weeks 3-5

Due tomorrow:

Worksheet Packet 4
Lab: Flights II

Sep 23

Intro to Probability

Tested on Quiz 2

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Probability Foundations

Sep 25

Computing Probabilities

Tested on Quiz 2

Before class:
Notes

In class:
Slides Worksheet

Extras

Week 6

Sep 28

This Week

Quiz 2

SIGN UP
Timeslots: Sep 28-Oct 2
Content: Weeks 3-5

RETAKE of Quiz 2 Registration

SIGN UP starting Oct 3
Content: Weeks 3-5

Due tomorrow:

Worksheet Packet 5
Lab 5

Sep 30

Probability Distributions

Tested on Quiz 3

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Probability Distributions

Oct 2

Random Variables

Tested on Quiz 3

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

Week 7

Oct 5

This Week

RETAKE of Quiz 2

SIGN UP
Timeslots: Oct 5-16
Content: Weeks 3-5

Due tomorrow:

Worksheet Packet 6
Lab 6

Oct 7

Expected Value and Variance

Tested on Quiz 3

Before class:
Notes

In class:
Slides Worksheet Lab: Elections

Oct 9

Normal Approximation

Tested on Quiz 3

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

Week 8

Oct 12

This Week

RETAKE of Quiz 2

SIGN UP
Timeslots: through Oct 16
Content: Weeks 3-5

Quiz 3 Registration

SIGN UP starting Oct 12
Timeslots: Oct 19-23
Content: Weeks 6-8

Due tomorrow:

Worksheet Packet 7
Lab: Elections

Oct 14

From Samples to Populations

Tested on Quiz 3

Before class:
Notes

In class:
Slides Worksheet Lab: People's Park

Oct 16

Confidence Intervals

Tested on Quiz 3

Before class:
Notes

In class:
Slides Worksheet

Extras

Week 9

Oct 19

This Week

Quiz 3

SIGN UP
Timeslots: Oct 19-23
Content: Weeks 6-8

RETAKE of Quiz 3 Registration

SIGN UP starting Oct 24
Content: Weeks 6-8

Due tomorrow:

Worksheet Packet 8
Lab: People's Park I

Oct 21

Bootstrapping

Tested on Quiz 4

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: People's Park II

Oct 23

Intro to Hypothesis Tests

Tested on Quiz 4

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

Week 10

Oct 26

This Week

RETAKE of Quiz 3

SIGN UP
Timeslots: Oct 26-Nov 6
Content: Weeks 6-8

Oct 28

Hypothesis Tests II

Tested on Quiz 4

Before class:
Notes

In class:
Slides Worksheet Lab: Arbuthnot

Oct 30

Wrong By Design

Tested on Quiz 4

Before class:
Notes

In class:
Slides Worksheet

Extras

Week 11

Nov 2

This Week

RETAKE of Quiz 3

SIGN UP
Timeslots: through Nov 6
Content: Weeks 6-8

Due tomorrow:

Worksheet Packet 9
Lab 9: People's Park II & Mythbusters

Nov 4

Defining Causality

Tested on Quiz 4

Before class:
Notes

In class:
Slides Lab: A Matter of Taste Part I

Nov 6

Randomized Experiments

Tested on Quiz 4

Before class:
Notes Tutorial

In class:
Slides Lab: A Matter of Taste Part II

Extras

Week 12

Nov 9

This Week

Quiz 4 Registration

SIGN UP starting Nov 12
Timeslots: Nov 19-24
Content: Weeks 9-12

Due tomorrow:

Worksheet Packet 10
Lab: Arbuthnot

Nov 11

Holiday: Veterans Day

Nov 13

Causal Effects in Observational Studies

Tested on Quiz 4

Before class:
Notes Tutorial

In class:
Slides Worksheet

Extras

Week 13

Nov 16

This Week

Quiz 4

SIGN UP
Timeslots: Nov 19-24
Content: Weeks 9-12

Due tomorrow:

Lab: A Matter of Taste

Nov 18

The Method of Least Squares

Before class:
Notes Tutorial

In class:
Slides Worksheet

Nov 20

Evaluating and Improving Predictions

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Baseball

Extras

Week 14

Nov 23

This Week

Quiz 4

SIGN UP
Timeslots: through Nov 24
Content: Weeks 9-12

RETAKE of Quiz 4 Registration

SIGN UP starting Nov 25
Content: Weeks 9-12

Due tomorrow:

Worksheet Packet 11

Nov 25

Holiday: Thanksgiving

Nov 27

Holiday: Thanksgiving

Extras

Week 15

Nov 30

This Week

RETAKE of Quiz 4

SIGN UP
Timeslots: Nov 30-Dec 10
Content: Weeks 9-12

Due tomorrow:

Worksheet Packet 13
Lab: Baseball

Dec 2

Overfitting

Before class:
Notes Tutorial

In class:
Slides Worksheet

Dec 4

Logistic Regression

Before class:
Notes Tutorial

In class:
Slides Worksheet Lab: Diagnosing Cancer

Extras

Week RRR

Dec 7

This Week

RETAKE of Quiz 4

SIGN UP
Timeslots: through Dec 10
Content: Weeks 9-12

Due tomorrow:

Worksheet Packet 14
Lab: Cancer Diagnosis

Dec 9

Dec 11

Extras

Week Final Exams

Dec 14

This Week

Final Exam: Thu Dec 17

Alt Final: TBD

Dec 16

Exam Tomorrow ⮕

Dec 18

⬅ You missed it

Extras