Inferential Statistics

Attachments:

• Theory

1. Samples & Populations
2. Significance

Attachments:

• Non Parametrics

1. Why?

   Annotations:

   • used when the assumptions of the t -Test have not been met
2. Wilcoxon

   Annotations:

   • used at Ordinal level with related data. looks at ranks of differences rather than actual differences Null Hypothesis: two populations are identical.
3. Mann Whitney

   Annotations:

   • based on ranks. Null hypothesis: the populations which the samples are taken from are identical.

Attachments:

• t-Test

1. Related t-Test
2. Unrelated t-Tests
3. Understanding SPSS Ouputs
4. Difference Between Groups
5. Difference Within Groups
6. Effect Sizes
7. Confidence Intervals