1. Lecture PowerPoint Slides Basic Practice of Statistics 7 th Edition

2. Quick Poll Do entry slips help you learn the material better?

3. Chap 15 Quiz Results First, let’s look at this applet for the three distributions.this applet Four frequently missed questions.questions What to do if Chapter 15 is still confusing… Read the chapter in the book carefully Work through the examples (book, PPT, HW) with an actual pen, paper, and calculator Come to my office hours

4. Tracking down research articles

5. Statistical inference 5 Population Sample Collect data from a representative Sample... Make an Inference about the Population. After we have selected a sample, we know the responses of the individuals in the sample. However, the reason for taking the sample is to infer from that data some conclusion about the wider population represented by the sample. STATISTICAL INFERENCE Statistical inference provides methods for drawing conclusions about a population from sample data.

6. Key question: Which distribution? Distribution of Population Distribution of Sample Means (Sampling Distribution of the Mean)

7. Simple conditions for inference about a mean 7

8. What’s the average BMI for women in their 20s?

9. Example Confidence Interval

10. The reasoning of statistical estimation, cont’d

11. Figure 16.1, The Basic Practice of Statistics, © 2015 W. H. Freeman

12. Figure 16.2, The Basic Practice of Statistics, © 2015 W. H. Freeman

13. Overview of Chapters 15 and 16 13

14. 14 - Questions on Chap. 16 Quiz? - Let’s take a look at SA8

15. On average, how many hours of sleep do EMU students get per night? Image from Berkeleysciencereview.com

17. Confidence interval 17

18. Figure 16.5, The Basic Practice of Statistics, © 2015 W. H. Freeman What if we want a level of confidence other than 68%, 95%, or 99.7%?

19. Figure 16.3, The Basic Practice of Statistics, © 2015 W. H. Freeman What if we want something other than 68%, 95%, or 99.7%?

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21. What is the average surname length for our stats classes?average surname length

22. Another Example: Quality of Life On average, what is the average level of belief in the Bible among EMU students? (Notice that our two classes are now a sample rather than a population.)average

24. Confidence level 24

25. Final Example: NAEP Scores