📐 P-Value Calculator
Calculate the p-value from a z-score using normal distribution approximation.
What is a P-Value?
A p-value is the probability of obtaining a result at least as extreme as the observed result, assuming the null hypothesis is true. A small p-value (typically less than 0.05) indicates strong evidence against the null hypothesis. One-tailed tests check for an effect in one direction, while two-tailed tests check for effects in both directions.
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