# How is p-value related to #alpha#?

##### 1 Answer

Mar 19, 2018

We reject null hypothesis if p-value is less than

#### Explanation:

p-value = probability that an event (as extreme as current sample) occurs when null hypothesis is true. The lower is this probability, the more unlikely it is that the null is true.

Relation: We reject null hypothesis if p-value is very small, more precisely, when it is smaller than the significance level