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Quantitative Methods in Social Sciences (E774): Review Session VIII

Quantitative Methods in Social Sciences (E774): Review Session VIII. Dany Jaimovich November 11, 2009. Plan for today. Policy Paper II Assignment II Assignment III Two sample mean test. Policy Paper II. Weeks 5-8: Probability theory Sampling Static inference: point, CI

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Quantitative Methods in Social Sciences (E774): Review Session VIII

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  1. Quantitative Methods inSocial Sciences (E774): Review Session VIII DanyJaimovich November 11, 2009

  2. Plan for today • Policy Paper II • Assignment II • Assignment III • Two sample mean test

  3. Policy Paper II • Weeks 5-8: • Probability theory • Sampling • Static inference: point, CI • Use of z-test and/or t-test • Hypothesis analysis • Two-sample test • Qualitative analysis

  4. Assignment II • Question 2: • ztable (z=5 out of table, >99.99% out)

  5. Assignment II • Question 3: • zcalc 25 8.4 4.68 • zcalc 5.9 8.4 4.68 • zcalc 20 8.4 4.68 • zcalc 20.6 8.4 4.68 • ztable (99.34% of probability of Canada been higher than average european) • zdemo 2.48

  6. Assignment III • Question 2: • When the variable of analysis is a proportion, there are some differences: • Standard errors= • The CI for proportions is: =

  7. Assignment III • Question 2: • prtesti 55 .84 0.5 (test majority) • prtesti 55 .84 0.99 (test consensus) • prtesti 55 .84 0.90 (test p=90%) • prtesti 200 .84 .90 (more observations)

  8. Assignment III • Question 3: • zcalc 259 200 200 46 (weknowσ=200) • ttesti 46 259 249 200 (wedon’tknowσ, but we know s.d.=249)

  9. Two samples mean test • Gambian villages: • bysort village: sum hhsize • sdtesti 26 12.46 12.92 21 19.28 11.67 • ttesti26 12.46 12.92 21 19.28 11.67

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