P-Value Calculator: Z-Score to P-Value
Calculate P-Value from Z-score.
What is a P-Value?
In statistics, the P-value is the probability of obtaining test results at least as extreme as the results actually observed, assuming that the null hypothesis is correct. It helps you determine the significance of your results.
Interpreting Results
- Enter your Z-score (standard score).
- The calculator determines the area under the normal distribution curve.
- If P-value < 0.05, the result is typically considered 'statistically significant'.
Statistics FAQs
What does a P-value of 0.05 mean?
It means there is a 5% chance that the results occurred by random chance. This is the standard threshold for rejecting the null hypothesis.