Hypothesis Testing

Statistical vs. Practical Significance

Null Hypothesis

Alternative Hypothesis

One-Tailed vs. Two-Tailed Tests

Stating Hypotheses

Setting Significance Level

Choosing Test Statistic

Determining Critical Values

Making Statistical Decision

Drawing Conclusions

Definition of P-Value

Calculating P-Values

Interpreting P-Values

P-Value vs. Critical Value Approach

Type I Error

Type II Error

Relationship Between Type I and Type II Errors

Statistical Power