p-Value and Power of a Test

Explaining p-value

We have all used this is in our stats classes: the null hypothesis is rejected if p<0.05. This short blog is about an explanation of p-value, and how it is connected to the confidence interval and power of a test.

p-value definition (from stats 101/Wikipedia)

p-value is a probability of obtaining test results at least as extreme as the results actually observed, under the assumption that the null hypothesis is correct. (difficult to make sense of easily)