Unformatted text preview: roup Comparisons
In ANOVA, group means are statistically
Null Hyp.: No group differences exist on the
Examine F-Ratio : Between groups Var.
Within groups Var.
Within Between-Groups Variance (Good)
Distance between group means Within-Groups Variance (Bad, Error Var.)
Variance within each group’s distribution One-way ANOVA
Compare 2 groups (1 IV): 2 mutually-exclusive groups
Independent Samples T-test (N<100)
F-test (N>=100) One-way Analysis of Variance (ANOVA) One-way ANOVA
Hypothesis Testing in ANOVA: Evaluate Null:
Examine observed p-value for F-ratio Evaluate Alternative:
Examine group means. If you hypothes...
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- Spring '14