Definitions

• Null hypothesis: $H_0$, what we assume to be true
• What is the Alternative Hypothesis? ( $H_1$ )

  What would be true, if $H_0$ is false
• Significance level ( $\alpha$ ): the given threshold of likeliness
• One-tailed test: when $H_1$ is either: $p\ >\ k$ or $p\ <\ k$
• In a two tailed test, you halve the value of the significance level for each end