# The Idiot's Guide to the Meaning and Significance of P-value

P-values play a vital role in deciding which papers get published in research, and which programs receive funding in industry. For this reason, we tell you the meaning and significance of p-value, through this interesting post.

Akshay Chavan

Last Updated: Dec 18, 2018

Did You Know?

The popular journal Basic and

*Applied Social Psychology*has banned all research papers containing p-values, believing that they lead to low-quality research.Null and Alternative Hypotheses

In the field of statistics, a particular claim about a population is studied by using a representative sample by the process of 'hypothesis testing'.

P-value Meaning

In statistics, p-value is the probability that some results obtained from an experiment or study may be due to chance, or accident. More precisely, it tries to find out evidence against the null hypothesis, by deciding how many results would be obtained merely by chance if the null hypothesis were true.

P-value Significance

As mentioned before, p-value tries to find evidence against the null hypothesis, i.e., the event that different observations in a study do not affect each other. Before any study or experiment is performed, a particular 'significance level' is fixed (hence called 'fixed hypothesis testing').