Scenario 1: Ginkgo biloba and Acetazolamide are two drugs used to help prevent contracting headaches at high altitudes. A research study found that 52 out of 125 people who were randomly assigned to take ginkgo biloba got a headache while 32 out of 128 people who were randomly assigned to take acetazolamide got a headache.

Research Question: Are the two drugs different with regards to how likely a person is to get a headache?

Ginkgo Acetazolamide Total

Headache 52 32 84

No Headache 73 96 169

Total 125 128 253

a. Explanatory and Response Variables (categorical or quantitative)

b.Parameter of interest and symbol

c.Hypotheses in symbols

d.Proportions for each group and assign symbols

e. Relative Risk (Ginkgo/Acetazolamide) and interpretation

f. Observed Difference (Ginkgo - Acetazolamide)

g.Calculate a 95% confidence interval for the difference in proportions

h.Interpret this confidence interval in context

i.Based on the 95% confidence interval, we would ___________ the null hypothesis.Briefly explain your decision.

j.Conclusion in Context