Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...

Define statistical power List the potential consequences of doing a study that has low power, and also a study that has too much power. Explain what a type 1 and type ...

Read the sections on power and sample size (pages 37-39 and page 85) in Carl Schwarz's notes, Chapter 6. Some basic ideas: The significance level of a test protects against incorrect rejection of the ...

The probability that the null hypothesis will be rejected when it is actually true is called the false positive rate and is determined by the significance level of the test (called alpha which is ...