1) [ 6 pts. ] What is the main conceptual difference between a Type I error and a Type II error? Draw distribution pictures (one when the null is true, another when it is false) and identify regions corresponding to each of these four terms: , 1- , , and 1-.Write the definition of each of those four terms.

2) [ 2 pts. ] What are four factors that influence statistical power? Which three of those factors are under experimenter control?

3) [ 1 pt. ] What should you be cautious about if you reject H_o with a large sample size?