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Review Outline for Quantitative Analysis

Review Outline for Quantitative Analysis - ScWK 298 Review...

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ScWk 298 Quantitative Analysis Review Page 1 ScWK 298 February 10, 2009 Review Outline for Quantitative Analysis I. Basic variable definitions A. “Variable”—a characteristic or property that can vary B. “Constant”—a characteristic or property that does not vary (i.e. criterion for inclusion in your sample, such as “adolescent women who reported being abused”) C. “Attributes” –the values, categories, or scale units of a variable II. Types of Variables A. Dependent (a.k.a. “outcome” for evaluation studies) B. Independent 1. In evaluation studies, the intervention (a.k.a “group assignment”) is always the primary IV 2. Control variables—variables that, if not “held constant” would serve as a rival hypothesis effect on the DV III. Levels of Measurement—this is key to deciding your statistical test A. Continuous (a.k.a. “scale” variable in SPSS) 1. Ratio 2. Interval B. Categorical 1. Nominal a) Dichotomous variable—only two attributes b) Dummy variable c) Non-ordered polytomous variable (“Polytomous” means more than two attributes) 2. Ordinal (or, ordered polytomous variable)

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ScWk 298 Quantitative Analysis Review Page 2 Test yourself: Variable Continuous or categorical? Specific level of measure…
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