Factors affecting the choice of statistical tests

3 Factors deciding what to test

• test of difference or a correlation
• experimental design
• levels of measurement

Difference or Correlation

Difference: usually a research experiment, with two or more groups - looking for change in the DV based on IV - measure using a bar chart
Correlation: a relationship between variables - measure using a scattergram

Types of group design

Independent group design: different participants in each of…