What is the difference between statistical power and the p-value in hypothesis testing?

Data Science with Python Hard

Data Science with Python — Hard

What is the difference between statistical power and the p-value in hypothesis testing?

Key points

  • Statistical power is about correctly rejecting a false null hypothesis
  • P-value is about observing extreme results under the null hypothesis
  • Power depends on sample size, effect size, and significance threshold
  • P-value is not the probability that the alternative hypothesis is true

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