What is post hoc power - Definition and Meaning

Post Hoc Power :

Post Hoc Statistical Power is the probability that leads to the rejection of the null hypothesis and it indicates the power of a statistical test.

Formula :

P = 2 x (1 - Φ(z)) z = x̄ / σ√N Where, P = Post HOC Statistical Power z = z-score x̄ = Mean σ = Standard Deviation N = Number of samples
Payment Pooled Variance

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