Statitics

Question 1

What tests are used for association between groups of categorical data?

Answer 1

Chi-squared analysis,
Fisher’s exact test.
E.g. Used if patients categorised as treatment success or failure.

Question 2

Which tests are non-parametric?

Answer 2

Wilcoxon matched pairs test (e.g. patients used as own controls).
Mann Whitney U-test (not statistically most powerful).

Question 3

What test can be used for normally distributed data?

Answer 3

Student’s unpaired t-test