refer to the data below. This table describes results from a clinical trial of drug A. Some subjects were treated with Drug A while others were given a placebo; then headache events were recorded....

Extracted text: refer to the data below. This table describes results from a clinical trial of drug A. Some subjects were treated with Drug A while others were given a placebo; then headache events were recorded. Headache No Headache Drug A 117 617 Placebo 29 696 2. For those in the Drug A treatment group, find the probability that the subject experienced a headache. 3. Compare P(headache|Drug A) and P(headachelplacebo). 4. Find the value of the absolute risk reduction for headaches in the treatment and placebo groups. 5. Find the number of Drug A users that would need to stop using Drug A in order to prevent a single headache. 6. For those in the Drug A treatment group, find the odds in favor of a headache, then find the odds against a headache. 7. Find the odds ratio for headaches in the treatment group compared to the placebo group, then interpret the result. Should Drug A users be concerned about headaches as an adverse reaction?