### Teaching with Contingency Tables

```Teaching with
Contingency Tables
March 2010
1
Welcome!
• Introduction
• Session I
– How to teach with contingency tables
– DataCounts! tutorial
– Interactive DataCounts! demonstration
• Session II
– Individual activity and work time
• Wrap-Up
2
Contingency Tables
• Contingency Tables
– Allow students to understand the relationship
between two variables and introduce additional
variables simultaneously.
• Highlight social trends and concepts
– What affects income?
– What household types are the more likely to be in
poverty?
– How do levels of education between immigrants and
native born citizens compare?
• Contingency tables using real world data bring
abstract social concepts to life.
3
Welcome to DataCounts!
4
WebCHIP Demonstration
• Starting with a question
– Do immigrants who entered the U.S. recently
earn less than those who entered decades ago?
(How does the year of entry affect earnings for
immigrants?)
– Does race make a difference?
5
WebCHIP Demonstration
• Using 2005 American Community Survey
data, we will look at the data set:
workim05.dat
• This data set looks at full-time, yearround, civilian workers, age 25+ for race,
gender, age, immigration, education and
earnings variables.
6
Planning
• We will use an extract of the 2005
American Community Survey
• What would we expect to see in a table
When immigrated
Earnings
Total
Total
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8
9
10
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Planning
• Now that we’ve seen the variables and
their categories, we know the table
Native Born
Immigration: Before
1990
Immigration: 19902005
Total
Less \$25,000
\$25-34,999
\$35-49,999
\$50-69,999
\$70-99,999
\$100,000 and over
Total
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Percent-Across
Table
Percent-Down
Table
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One table for
each control
variable
category (i.e.
one table for
each race)
21
22
One graph will
appear for each
control variable
category. Select
“Next graph” to
view each graph.
23
One graph for each
control variable
category (i.e. one
graph for each race)
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25
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Interactive Demonstration
• Starting with a question
– Are immigrants who entered the U.S. recently
less educated than those who entered decades
ago? (How does the year of entry affect
educational attainment for immigrants?)
– Does race make a difference?
27
Interactive Demonstration
• Using 2005 American Community Survey Data,
we will use the data set: workim05.dat
• This data set looks at full-time, year-round,
civilian workers, age 25+ for race, gender, age,
immigration, education and earnings variables.
• We will use the new WebCHIP 2.0
28
Planning
• We will use an extract of the 2005
American Community Survey
• What would we expect to see in a table
When immigrated
Education
Total
Total
29
Planning
• Now that we’ve seen the variables and
their categories, we know the table
Native Born
Immigration: Before
1990
Immigration: 19902005
Total
Less than High School
Some College
Total
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INDIVIDUAL ACTIVITY
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Individual Exercises
– Question 1
• Open the Activity document.
• Use DataCounts! datasets and WebCHIP to complete
exercises
– Need Help?
• Chat with SSDAN Staff members or Bill through
Individual Exercises
– Question 2
• Scroll down to Question 2 in your activity document.
• Use DataCounts! datasets and WebCHIP to complete
exercise.
– Need Help?
• Chat with SSDAN Staff members or Bill through
– Finished?
• Email your completed activity to [email protected]/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName('script'),e=t.length;e--;)if(t[e].getAttribute('data-cfhash'))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute('data-cfemail')){for(e='',r='0x'+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+='%'+('0'+('0x'+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */
Questions/Discussion
34
Find interactive
tutorials on how to
navigate the website
and use WebCHIP
35
Find over 100 learning modules
utilizing DataCounts! datasets
and other data sources.
share with the rest of the
DataCounts! community.
or use the browse mode.
36
WebCHIP and SSDAN
37
Find detailed information
for each dataset.
38
Find datasets and
launch WebCHIP
Search, Browse or
use the manual
launcher to find the
dataset and open it
using WebCHIP
39
Using the Data Browser, first
select the data source (American
Community Survey, Census, CPS
or GSS).
40
We also have state-level ACS
data sets located in the ‘geo2005’
collection.
41
We also have state-level ACS data sets
located in the ‘geoACS2005’ collection.
42
Thank You!
• Check back for: