Permutation Test Demo

CPR Study: Does blood thinner affect survival rate?

Original Samples

Treatment (40 patients)

Survived: 14
Died: 26
Proportion Survived: 0.350

Control (50 patients)

Survived: 11
Died: 39
Proportion Survived: 0.220
Difference in Proportions: 0.350 - 0.220 = 0.130 ← Original Data

Distribution of Differences

Red circle shows original difference (0.130). Blue circles show permutation differences.