Statistics &amp; SPSS Review

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# Statistics & SPSS Review - PowerPoint PPT Presentation

Statistics &amp; 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

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
SPSS t-test Output

Variance

 x i - Mean )2

Variance = s2 = -----------------------

N

Standard Deviation = s =  variance

Regression line

W = 3.3 H - 73

Regression Coefficients

Sentence = -3.5 G.P.A. + 18

Correlation

Interpreting r as r2

r = -.22 r2 = .05

G.P.A. “explains” 5% of variance in SENTENCE length