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A/B testing & experimentation

User bucketing, experiment metrics, statistical comparison, and rollout guardrails.

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A/B testing & experimentation medium

How to Run a Permutation Test in Python

Run a Monte Carlo permutation test to compute a p-value for comparing two group means without parametric assumptions.

permutation-test statistics ab-testing
Python 
import random
import statistics

def permutation_test(group_a, group_b, n_permutations=10000, seed=42):
    random.seed(seed)
    combined = group_a + group_b
    observed_diff = abs(statistics.mean(group_a) - statistics.mean(group_b))
    
    count = 0
    n = len(group_a)
    for _ in range(n_permutations):
       …
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