Hypothesis Testing

Assignment #9 

Hypothesis Testing 

9.1 Briefly explain in your own words the advantage of using an alpha level (α) = .01 versus an α = .05.  In general, what is the disadvantage of using a smaller alpha level? 

9.2 Discuss in your own words the errors that can be made in hypothesis testing. a. What is a type I error?  Why might it occur? b. What is a type II error?  How does it happen?

9.3 The term error is used in two different ways in the context of a hypothesis test. First, there is the concept of standard error (i.e. average sampling error), and second, there is the concept of a Type I error. a. What factor can a researcher control that will reduce the risk of a Type I error? b. What factor can a researcher control that will reduce the standard error?