RM 4: Spearman's rank test (BP)

Question 1

Why use spearman’s rank?

Answer 1

• when you want to investigate the strength and direction of a relationship between two variables
• correlation

Question 2

how to choose proper statistical test?

Answer 2

Testing diference:
- Independent groups + nominal = Chi-squared test
- independent groups + ordinal = Mann-whitney U
- Repeated measures/matched pairs + ordinal = Wilcoxon

Testing relationship:
- relationship + ordinal = Spearman’s rho