Do Now: Take our your calculator.Level of Education of People 25 to 34 Years

Old in the US 2007Level of Education Number of persons

(thousands)Percent

Less than high school 5,126 12.9

High school graduate 11,408 28.6

Some College 10,961 27.5

Bachelor’s Degree 9,076 22.8

Advanced Degree 3,299 8.3

Total 39,868 100

Source: U.S. Census Bureau, Current Population Survey, 2007

1. What type of variable is level of education?2. How many people in the U.S. had a bachelor’s degree or higher in

2007?3. What percent of people in the U.S. had a bachelor’s degree or higher

in 2007?

Categorical Displays

Unit 1: Univariate Data

Objectives

• Interpret bar graphs, pie charts, and other categorical data displays

Bar Graph:Display categorical data

Les th

an h

igh

scho

ol

High

scho

ol g

radu

ate

Som

e co

llege

Bach

elor

's d

egre

e

Adva

nced

deg

ree

0

10

20

30

U.S. Education Level

Pie Chart: Display of categorical data

Les than high school13%

High school grad-uate29%

Some college

27%

Bachelor's degree23%

Advanced degree8%

U.S. Education Level

Hang up and Drive!The Harris Poll conducted an online survey of 2085 U.S. adults about cell phone use while driving. Over half (56%) of those who responded said that it is dangerous or very dangerous for someone to use a cell phone while driving. One survey question asked, “How often do you talk on a cell phone while you are driving?” Respondents could choose from the options “Always”, “Sometimes”, or “Never”. The bar graph shows the percent who chose “always” or “sometimes” by U.S. region.

East

Mid

wes

t

Sout

hW

est

00.5

11.5

22.5

33.5

44.5

5

U.S. Region

Perc

en

t u

sin

g c

ell p

hon

e w

hile

dri

vin

g

Did we accomplish our objective?

Independent Practice and Homework

• Khan Academy: HSS.IC.A.1, HSS.IC.A.2, HSS.IC.A.3 DUE THURSDAY 9/18

Excel Activity using Chapter 2 Exercises (p. 40)