1. Mahrita.Harahap@uts.edu.au Maths Study Centre CB04.03.331 Open 11am – 5pm Semester Weekdays Check out www.khanacademy.org www.khanacademy.org This presentation can be found at: www.mahritaharahap.wordpress.com/teaching-areas/ www.mahritaharahap.wordpress.com/teaching-areas/ Marking Scheme: 0 if less than 50% attempted, 1 for more than 50% attempted but less than 50% correct, 2 if more than 50% correct.

2. A) Testing for Association between two variables: H o : No association between the two variables (in the population) so any pattern we see is just due to random variation. H a : An association exists between the two variables (in the population). Test Stat: If X 2 > X 2 (rows-1)×(columns-1), this means p-value<α, so we do reject the null hypothesis. We have enough statistical evidence to prove an association exists between the two variables

3. B), C), D) and E)

4. F) Testing for Association between two variables: H o : No association between the two variables (in the population) so any pattern we see is just due to random variation. H a : An association exists between the two variables (in the population). Test Stat: If X 2 > X 2 (rows-1)×(columns-1), this means p-value<α, so we do reject the null hypothesis. We have enough statistical evidence to prove an association exists between the two variables

5. F), G) and H)

6. Lab 9: Logistic Regression

8. A)

9. B)

10. C) H0: Odds Ratio=1 Ha: Odds Ratio≠1 Use the confidence interval to answer this question. Is 1 a possible value for the population odds ratio?

11. E) F)