Anova Review

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ANOVA stands for...

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Analysis of Variance

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ANOVA testing is used for...

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Testing three or more means.

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One-Way Within Groups ANOVA variables

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1 independent variable, 1 dependent variable

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Scenario: Psychiatric patients test three therapies: counseling, medication, biofeedback. Determine ANOVA type.

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one-way ANOVA test

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Interaction of physical activity level and gender on children's blood cholesterol concentration.

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two-way ANOVA test

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ANOVA assumptions include: variance homogeneity, normal distribution, and random selection.

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4 or more independent groups

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ANOVA test assumptions: Homogeneity of variance, Normality, Independence of observations.

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Equal population size for group.

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One-way ANOVA alternate hypothesis:

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At least one difference among population means.

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Alternative hypothesis formulation

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At least one mean is different

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Sum of squares measuring variability around treatment means: ______

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Error