Enter your test statistic, select the tail type, and calculate the p-value using the calculator above.
P-Value Calculation Formula
The following formula is used to calculate the p-value from the test statistic.
P-Value = (1 - NormalCDF(testStatistic)) * 2
Variables:
- P-Value is the probability value
- Test Statistic is the z-score obtained from the test
To calculate the p-value, first determine your test statistic, select the appropriate tail type, and use the formula above to compute the p-value.
What is P-Value Calculation?
P-value calculation is a method used in statistical hypothesis testing to determine the significance of results. It measures the probability of obtaining test results at least as extreme as the results observed, assuming that the null hypothesis is correct. A lower p-value indicates stronger evidence against the null hypothesis, suggesting that the observed data is unlikely to have occurred by chance.