1. Homework Questions?

2. Section 9.2 Tests about a Population Proportion

3. Test Statistic

4. Mr. Suk & Basketball In a SRS of 50 free throws, Mr. Suk made 32. What is the test statistic? Find and interpret the p-value.

5. Significance Test State: What hypotheses do you want to test, and at what significance level? Define any parameters you use. Plan: Choose the appropriate inference method. Check conditions. Do: If the conditions are met, perform calculations. Compute the test statistic (z) Find the P-value Conclude: Interpret the results of your test in the context of the problem.

6. One-Sample z Test for a Proportion

7. POTATOES again…

8. Do: Conclude: POTATOES again…

9. Two-Sided Tests…Example A website says that 50% of high school students have never smoked a cigarette. Trey wonders if this is true in his large, urban high school. Trey selects a SRS of 150 students from his school and 90 of them say they have never smoked a cigarette. What should Trey conclude? Give appropriate evidence to support your answer. State: Plan:

10. Trey… Do: Conclude:

11. How does this tie into confidence intervals? In Chapter 8 we would have done a confidence interval to be 95% confident…do that for Trey’s school instead!

12. Homework Pg 562 (33, 35-38, 46-52, 54-60) Do 37, 38, and 52 as a class!