For example, AMA style uses "P value", APA style uses "p value", and the American Statistical Association uses "p-value". In all cases, the "p" stands for probability.[1]

Aug 11, 2025 · A p-value, or probability value, is a number describing how likely it is that your data would have occurred by random chance (i.e., that the null hypothesis is true).

Sep 2, 2025 · A p-value is a number that helps us judge how surprising our results are if there really were no effect. The smaller the p-value, the less likely it is that the results happened just by chance.

Oct 2, 2025 · P-value is the level of marginal significance within a statistical hypothesis test, representing the probability of the occurrence of a given event.

May 11, 2025 · But what exactly is a p-value, and why is it so important (and sometimes controversial) in the world of statistics? This comprehensive guide aims to demystify the p-value, providing a clear …

Jul 27, 2025 · It represents the probability of obtaining results as extreme as, or more extreme than, the observed results under the assumption that the null hypothesis is true. In simpler words, it is used to …

Jul 16, 2020 · What exactly is a p value? The p value, or probability value, tells you how likely it is that your data could have occurred under the null hypothesis. It does this by calculating the likelihood of …

In this post, you’ll learn how to find the p value. I’ll start by showing you the general process for all hypothesis tests. Then I’ll move on to a step-by-step example showing the calculations for a p value. …

Sep 22, 2025 · When a researcher concludes that the null hypothesis is false, the researcher is said to have rejected the null hypothesis. The probability value below which the null hypothesis is rejected is …

Did we solve your problem today? The p-value calculator can help you find the p-value and evaluate how compatible your data is with the null hypothesis.