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Comparing Linear Regressions in Chapter 18: Intelligent Female vs. Male Chupacabras

Explore how to compare linear regressions, including significance tests and sample calculations, for intelligence and age in chupacabras. Topics include slopes, Chi-square goodness of fit, contingency tables, sign tests, and run tests.

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Comparing Linear Regressions in Chapter 18: Intelligent Female vs. Male Chupacabras

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  1. Comparasión de Regresión Lineales Capitulo 18

  2. Los temas • Regresión Lineal • Comparando ecuaciones lineales • Bondad de ajuste (Chi square) • Tabla de contingencia • The sign test (la prueba de signos) • The run test (la prueba de corrida)

  3. Hembra Macho La inteligencia La edad de los chupacabras

  4. Comparing simple linear regressions • Fig. 18.1

  5. Comparing Slopes

  6. Ho: ? Ha: ? Sample 1 Sample 2

  7. Calculate the following

  8. Calculate the following

  9. Do you accept the Ho?

  10. Comparing two elevations • The regression lines have the same elevations? • Sum of squares of X for the common regression

  11. Sum of cross products for the “common regression”

  12. Sum of squares of Y for the “common regression”

  13. Residual SS for the “common regression”

  14. La regressión en comun

  15. La prueba

  16. Sample 1 Sample 2

  17. Resultado • Ac = 2671.6256 • Bc = 4060.7718 • Cc = 6467.2410 • bc = 1.520 • SSc = 295.0185 • DFc = 25 • (s2Y*X)c = 11.8007 • t = 8.218, • t0.05,(2),25 = 2.060

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