1. Matched Pairs Test
Section 11.2

2. Sodoku Anyone? *I need some people who have never played…
*Let’s see if boys are better than girls….

3. Are Boys Better than Girls?

4. Newbies…Do your scores increase if I explain how it’s scored?

5. Matched Pairs T-Test
Matching subjects according to a characteristic for blocking purposes.
Can be paired in before/after
Screens out extraneous factors.
Inferences can be based on the differences between the 2 observations in each sample pair.

6. Parameter of Interest

7. Assumptions Dependent (Paired) Random samples Approximately normal
Use boxplot to show this
(only 1 – of the list of differences)

8. Test Statistic

9. An educator claims that a special vitamin will increase a weight lifter’s strength. Eight weight lifters are selected and given a test and are tested again 2 weeks after the vitamin use.
Athelete 1 2 3 4 5 6 7 8
Before
210
230
182
205
262
253
219
216
After
236
179
204
270
250
222

10. Confidence Interval

11. A dietitian wishes to see if a person’s cholesterol level will change if the diet is supplemented by a mineral. Can it be concluded that the cholesterol level has changed. Construct a 90% confidence interval.
Subject 1 2 3 4 5 6
Before
210
235
208
190
172
244
After
170
188
173
228

12. Homework
Worksheet