2.3. Learning Objectives

Here is what you should understand after this week

2.3.1. Concepts

• In statistical testing, a data sample is used to represent the population from which it is drawn

• For small samples, outliers may render a sample unrepresentative

• Replacing data with their ranks mitigates the effect of outliers on statistical tests

2.3.2. Python skills

After this week you should be able to carry out, using scipy.stats:

• Mann-Whitney or Wilcoxon Rank-Rum test (independent samples)

• Wilcoxon sign-rank test (paired samples)

• Spearman’s rank correlation including obtaining a \(p\)-value