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Unformatted text preview: 3-1-11Chapter 9 – using Statistics to Answer QuestionsUsing Statistics to Answer Questions•Statistics: branch of mathematics that involves the collection, analysis, and interpretation of data.oTwo main branches of statistics assist you decisions in different waysDescriptive Statistics•Procedures used to summarize a set of data•Measure of central tendency: typical or representative score•Variability: what spread exists in the scoresInferential Statistics•Inferential statistics are used to analyze data after you have conducted an experiment to determine whether your independent variable had a significant effect.Scales of Measurement•Measurement: the assignment of symbols to events according to a set of rules•Scale of measurement: a set of measurement rules•Nominal ScaleoEvents are assigned to categories; classify your research participants as men or women, as right-handed or left-handed, as Catholic or ProtestantoDifferences between categories are qualitative (kind) and not quantitative (degree)oDo number of individuals in one category differs as a function of some treatment?treatment?...
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This note was uploaded on 04/05/2012 for the course PSY 3213 taught by Professor Staff during the Spring '11 term at FSU.
- Spring '11