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Measures of Association

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Measures of Association

10/30/2012

- Chapter 7 Tests of Significance and Measures of Association (Pollock) (pp. 169-179)
- Chapter 11 Doing Your Own Political Analysis (Pollock Workbook)

- Some Due Today
- More Due 11/6
- Chapter 7 Pollock Workbook
- Question 1
- A, B, C, D, E, F

- Question 2
- A, B, C, D

- Question 3
-A, B, C, D

- Question 5
- A, B, C, D, E

- Question 1

- Chapter 7 Pollock Workbook

- When
- Wednesday 11-1
- Thursday 8-12
- And appointment

- http://cookpolitical.com/

- Students will be able to interpret and explain empirical data.
- As this course fulfills the Computational Skills portion of the University degree plan, students will achieve competency in conducting statistical data analysis using the SPSS software program.

- To determine whether a relationship exists between two variablesand did not arise by chance. (Statistical Significance)
- To measure the strength of the relationship between an independent and a dependent variable? (association)

Nominal Variables

Nominal

Ordinal

Strength

Significance

Direction!

- Strength
- Significance

- What Percent of Americans believe that Jesus will definitely return in the next 40 years?
- State the full directional relationship found in the cross tab. (people who are not born again Christians are….)

- Maurice Duverger (1957) wrote that "the simple-majority single-ballot system favors the two-party system" and that "multimember districts favor multiple parties". Hypothesis- PR systems will have more parties
- D.V. -enpp3_democ (Effective number of parliamentary parties: 3 cats)
- IV-pr_sys (PR system)

- From the states.sav
- Hypothesis- States that are more secular, will have fewer restrictions on abortion
- DV- abortlaw3
- IV- secularism3

- An Advantage of SPSS is incorporating outputs into documents
- The best way to do this is to paste it as an image within your document

- Right Click on your output and choose copy

- The paste special command gives you the most options
- Pasting as an image allows you to resize and move your output around the document

Step 1

Step 2

- DON’T Just Cut and paste
- It is more trouble than it is worth (resizing columns, spacing, etc)

Adding a Third Variable

- the relationship between two variables may be spurious, weak or even too strong
- "controlling" for a third variable is a method of removing or separating the effects of another variable.
- This gets at the underlying relationship

- Is there an antecedent variable at play?
- Is the observation different for different groups of people

- H1: People with children will have different views on legalization than others of the same ideology
- Cross-tabs
- Input Row Variable
- Input Column Variable
- To control for a variable place it in the area that says Layer 1 of 1.

- DV- homosex2
- IV- partyid3
- Control- race 2