1. Define statistical power
2. List the potential consequences of doing a study that has low power, and also a study that has too much power.
3. Explain what a type 1 and type 2 error is, and give typical values for type 1 and type 2 error rates that are used when analysing and planning a study.
4. State the factors that affect power and what factors we have to specify to do a sample size calculation.
