Inferential Statistics

Inferential Statistics

1. Theory

   • Theory
   • Samples & Populations
   • Significance

2. Non-Parametrics

   • Non Parametrics
   • Why?
     • used when the assumptions of the t -Test have not been met
   • Wilcoxon
     • used at Ordinal level with related data. looks at ranks of differences rather than actual differences Null Hypothesis: two populations are identical.
   • Mann Whitney
     • based on ranks. Null hypothesis: the populations which the samples are taken from are identical.

3. t-Tests

   • t-Test
   • Related t-Test
   • Unrelated t-Tests
   • Understanding SPSS Ouputs
   • Difference Between Groups
   • Difference Within Groups
   • Effect Sizes
   • Confidence Intervals