| A | B |
|---|
| Hypothesis | A statement about the world that can be either true or false |
| Null Hypothesis | The hypothesis that there is no impact or change |
| One-tailed Test | A significance test in which the hypothesis specifies a direction |
| Two-tailed Test | A significance test in which the hypothesis does not specify direction |
| Type 1 Error | Rejecting the null hypothesis when it is true |
| Type 2 Error | Accepting the null hypothesis when it is false |
