What is the P-Value Calculator?

The P-Value Calculator is a statistical tool that helps you determine the probability of observing a test result as extreme as your Z-score under the assumption that the null hypothesis is true. By entering a Z-score, the calculator instantly computes the two-tailed p-value using the standard normal distribution. This tool is especially useful for students, researchers, and analysts who need quick hypothesis-testing results for exams, scientific studies, or data analysis without performing lengthy manual calculations.

How to Use:

1. Enter the Z-Score: Type the Z-value obtained from your statistical test, such as 1.96, 2.5, or any real number.
2. Click “Calculate”: The calculator processes the value using the standard normal cumulative distribution.
3. View the Result: The two-tailed p-value appears in the result box, helping you interpret significance and decide whether to reject or accept the null hypothesis.