Factors affecting the choice of statistical tests

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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


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