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Chapter 21

Chapter 21. Which test to use?. Guidelines for selecting the appropriate hypothesis test (1). Type of Data (Are observations numbers?) NO Qualitative Yes Quantitative. [Are observations cross-classified?] NO Yes. Number of Groups One Two Three. One-Variable χ 2 Test. Two-Variable

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Chapter 21

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  1. Chapter 21 Which test to use?

  2. Guidelines for selecting the appropriate hypothesis test (1) Type of Data (Are observations numbers?) NO Qualitative Yes Quantitative [Are observations cross-classified?] NO Yes Number of Groups One Two Three One-Variable χ2 Test Two-Variable χ2 Test t for one sample Next page

  3. Guidelines for selecting the appropriate hypothesis test (2) Number of Groups One Two Three [Are multiple observations made for same subject?] NO YES TWO GROUPS [Are quantitative observations paired?] NO YES Independent Related Samples Samples F for ANOVA [Are quantitative observation classified for two factors?] NO YES Repeated- measures F-Test One-Factor F-Test* Two-Factor F-Test t for two independent samples* Next page

  4. Guidelines for selecting the appropriate hypothesis test (3) [Are paired observations evaluated for a relationship?] NO YES (Difference) (Relationship) t for two related samples* t for a correlation coefficient [*If any assumption is seriously violated or original observations are ranks…] Mann-Whitney U-Test Wilcoxon T-Test Kruskal-Wallis H-Test

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