Maths Study Centre CB Open 11am – 5pm Semester Weekdays Check out This presentation can be found at: 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.

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

B), C), D) and E)

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

F), G) and H)

Lab 9: Logistic Regression

A)

B)

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?

E) F)