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Statistics & SPSS Review

Statistics & SPSS Review. Fall 2009. Types of Measures / Variables. Nominal / categorical Gender, major, blood type, eye color Ordinal Rank-order of favorite films; Likert scales? Interval / scale Time, money, age, GPA. Main Analysis Techniques. Main Analysis Techniques.

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Statistics & SPSS Review

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  1. Statistics & SPSS Review Fall 2009

  2. Types of Measures / Variables • Nominal / categorical • Gender, major, blood type, eye color • Ordinal • Rank-order of favorite films; Likert scales? • Interval / scale • Time, money, age, GPA

  3. Main Analysis Techniques

  4. Main Analysis Techniques

  5. SPSS Cross –tab with Chi-Square

  6. SPSS Cross –tab with Chi-Square p < .05

  7. Main Analysis Techniques

  8. SPSS t-test Output

  9. SPSS t-test Output 1. Read means 3. Read p value 2. Read Levene’s Test

  10. Analysis of Variance

  11. SPSS ANOVA output

  12. SPSS ANOVA output p value

  13. Variables & Statistical Tests

  14. Variance  x i - Mean )2 Variance = s2 = ----------------------- N Standard Deviation = s =  variance

  15. Regression line W = 3.3 H - 73

  16. Scatterplot: Sentence by G.P.A.

  17. Regression Coefficients Sentence = -3.5 G.P.A. + 18

  18. Correlation

  19. Correlation: Sentence & G.P.A.

  20. Correlation: Sentence & G.P.A. p value

  21. Correlation Interpreting r as r2 r = -.22 r2 = .05 G.P.A. “explains” 5% of variance in SENTENCE length

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