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Some of the most important concepts in statistics are the p-value, the null hypothesis and the significance level. I will use a simple example to explain what this is all for - what is the p-value? Why do we need the null hypothesis? How does the significance level come into play? And how does all this help us decide whether the result of an experiment is convincing or not? This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.(http://creativecommons.org/licenses/b...)