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Lecture

# SOC202H1 Lecture Notes - Standard Error, Coefficient Of Determination, Null Hypothesis

Department
Sociology
Course Code
SOC202H1
Professor
Scott Schieman

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Chi-Square test
March 27, 2012
Bring a basic calculator for the exam
Chi-square example
What social statuses predict support versus opposition to same-sex marriage?
Homosexuals should have the right to marry
Semantics influence the tone, can bias the results. Example using the homosexual
term versus gay men term. How does each word influence the results?
Example question
Is gender associated with attitudes toward same-sex marriage?
Null hypothesis: gender is independent from position.
Slide 3
636 represent the total number who oppose
79 represent male unsure
316 represent female support
606 represent total males
1336 represent total sample
What is the expected value?
Test question: define the expected value.
Chi-square analysis (slide 4)
SOC202H1S Quantitative Analysis in Soc. Science. March 27 2012. Scott Schieman. SP. TG.

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347.5 is the number of females who oppose homosexuality if null is true.
44.25 percentage of women who oppose same sex marriage.
51.65 percentage of men who oppose same sex marriage.
1. What is the chi-square value needed to reject the null? 5.99.
2. We obtained chi-square of 9.2048. We are able to reject the null hypothesis at
the 0.05 and 0.01 level.
3. Can cannot reject the null hypothesis at the 0.001 level
The chi-square values are values which are of the rare percentile. Typically 0.05 or
0.01
Question 2
Is scientific knowledge related to attitudes about same-sex marriage?
Scientific knowledge: does the earth go around the sun or the sun go around the
earth?
We cannot reject the null hypothesis.
The chi is 4.8658 but the critical values at 0.05 is 5.99
Question 3
Is astrological sign associated with attitudes about same0sex marriage?
Pearson chi2(8) = 5.4861 p= 0.705
There is no significant value. There are no patterns between sign and attitude on
same-sex marriage.
Chi-square joint frequencies
ANOVA uses means. Compares average scores. Measure of variance between and
within groups
SOC202H1S Quantitative Analysis in Soc. Science. March 27 2012. Scott Schieman. SP. TG.