# Summarizing Categorical Data

STAT 20: Introduction to Probability and Statistics

## Agenda

• Announcements
• Concept Questions
• Problem Set 2: Summarizing Categorical Data
• Break
• Introducing Lab 1
• Work time for Lab 1: Understanding Context

## Announcements

• RQ: Summarizing Numerical Data due Wednesday at 11:59pm on Gradescope.
• Quiz 1 next Monday, January 29th in-class. Topics covered:
• Understanding the World with Data
• Taxonomy of Data
• Summarizing Categorical Data (today)
• Summarizing Numerical Data (next class)
• Lab 1 (Class Survey) due Tuesday, January 29th at 9am on Gradescope. Make sure you read the Lab Submission Guidelines posted to Ed!
• Problem Set 2 due Tuesday, January 29th at 9am on Gradescope

# Concept Question 1

• The next four subquestions are based on the same table.

The table below displays data from a survey on a class of students.

What proportion of the class was in the marching band?

00:30

What proportion of those in the marching band where juniors?

00:30

What proportion were sophomores not in the marching band?

00:30

What were the dimensions of the raw data from which this table was constructed?

00:30

How would you characterize the association between these two variables?

00:30

## Concept Question 2

Political affiliation and college degree status of 500 survey participants.

Which group is the largest?

01:00

# Concept Question 3

What does this plot show?

01:00

# Problem Set 2: Summarizing Categorical Data

25:00

# Break

05:00

# Introducing Lab 1

Let’s visit the lab slides, which are available on stat20.org!

# Lab 1: Understanding the Context of The Data

25:00