Things to consider when selecting a statistical test

Professor Dr Norsa adah BachokUnit Of Biostatistics & Research Methodology,School Of Medical Sciences,UniversitiSainsMalaysia 1 Things to consider when selecting a statistical test2 Research questions Study design Number dependent/independent variables Type of variables: categorical/numerical Number of groups/categories Normality of distribution Sample size Related samples Research questions / Study hypotheses /Objectives3 Difference of means between groups Difference of proportions between groups Association between variables Relationship between variables Correlation between variables Effectiveness of an intervention Study Designrelated sample / match / paired / pre post4 DesignVariablesTest IndependentNumerical vscategoricalIndependent t testMatch case controlPre post (same cases measured twice)2 Numerical Paired t testMatch case controlPre post (same cases measured twice)

Professor Dr Norsa’adah Bachok Unit Of Biostatistics & Research Methodology, School Of Medical Sciences, Universiti Sains Malaysia 1. Things to consider when selecting

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