Two senior students investigate a current issue.

1. Views on Gay Marriage
Alex Roman
Andrea Morales
2012

2. January 2011
Strongly Favor or
Favor: 41%
Strongly Oppose or
Oppose: 47%
Unsure: 10%

4. H : Gender and views on gay marriage are
O
independent.
H : Gender and views on gay marriage are not
A
independent.

5. 2
2 observed expected
expected

6. Independent
Large sample size
(n=65)
Random

7. Surveys distributed
randomly to 65
seniors

8. Female Male Total
Support 37 13 50
Do Not 10 5 15
Support
47 18 65

9. 2
0.3098 df 1
p 0.578

10. Fail to Reject H O

11. 1-Prop Z Test
H : P(support) = .5
o
H : P(support) > .5
A
Z=4.34
P=0.000
Reject the null
hypothesis.

12. Our Survey
What is your view on gay marriage? (Circle ONE)
I support it I do not support it
Gender
Female Male

13. Potential
Errors
• Give a “no opinion”
option
• Biased answers

14. Views on Gay Marriage
Alex Roman
Andrea Morales
2012