The drug Ziac is used to treat hyptertension. In a clinical test, 3.2% of 221 Ziac users experienced dizziness (based on data from Lederle...

The drug Ziac is used to treat hyptertension. In a clinical test, 3.2% of 221 Ziac users experienced dizziness (based on data from Lederle Laboratories).a. Construct a 99% confidence interval estimate of the percentage of all Ziac users who experience dizziness. (Use Exact method)b. In the same clinical test, people in the placebo group didn't take Ziac, but 1.8% of them reported dizziness. Based on the results from part (a), what can we conclude about dizziness as an adverse reaction to Ziac?