Final - Sociology 549 Paul von Hippel Final Review Lecture 1 Exam is comprehensive Emphasizes second half of course Earlier topics do come back

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1 Final Review Lecture Sociology 549 Paul von Hippel
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2 Exam is comprehensive • Emphasizes second half of course • Earlier topics do come back though I won’t review them today • Today’s review themes nuts and bolts
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3 Themes
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4 Themes: Inferential statistics • Population vs. sample • Logic of hypothesis tests • Hypothesis tests and confidence intervals • Implications of sample size
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5 Population vs. sample: Sampling  error • The sample is not the population different means, different proportions, etc. • E.g., Although the sample (poll) favors Kerry the population (electorate) may still favor Bush
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6 Population vs. sample: Sampling  variation • If you take a different sample you get a different sample statistic even if the population is the same • E.g., Last week’s sample (poll) favored Kerry This week’s sample favors Bush But the population may not have changed
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7 .50 .55 .60 .65 .70 .75 p H Roosevelt L 0.02 0.04 0.06 0.08 0.1 Probability 95% of samples p Lecture 9, Example 1:  Sampling distribution of a sample proportion • Distribution of  p  across all possible samples when π =.61 and N =100
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8 Logic of hypothesis tests If the null hypothesis (H 0 ) were true… what would the sampling distribution look like?
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Final - Sociology 549 Paul von Hippel Final Review Lecture 1 Exam is comprehensive Emphasizes second half of course Earlier topics do come back

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