Z Score to P-Value Calculator
This calculator converts Z-scores to p-values using the standard normal distribution.
About Z-Scores
A Z-score (or standard score) indicates how many standard deviations an element is from the mean. A Z-score of 0 represents an element equal to the mean. A Z-score of 1 represents an element that is 1 standard deviation above the mean.
Formula
Z = (X - μ) / σ
Where X is the value, μ is the population mean, and σ is the standard deviation.
Interpreting P-Values
- p < 0.05: Statistically significant
- p < 0.01: Highly significant
- p < 0.001: Very highly significant
- p ≥ 0.05: Not statistically significant
