Chapter 22 Guiding Questions

1) When running a hypothesis test for the difference between two proportions, do we use standard deviation or standard error when finding our z-score, and what is the formula to find SD or SE?

2) Name and explain the assumptions and Conditions that need to be met in order to run a hypothesis test for differences between two proportions.

3) What is the formula for finding a two-proportion z-interval?

4) What is the null hypothesis going to be (usually) in a two proportion z-test?

5) What are the options for alternative hypotheses in a two-proportion z-test?

6) What is pooling and why do we use it when working with two-proportion z-tests?

7) Do we pool for a two-proportion z-interval? Why or why not?