Ziac is a Lederle Laboratories drug developed to treat hypertension. Lederle Laboratories reported that when 221 people were treated with Ziac, 3.2% of them experienced dizziness. It was also reported that among the 144 people in the placebo group, 1.8% experienced dizziness.
a. Can you use the methods of this section to test the claim that there is a significant difference between the two rates of dizziness? Why or why not?
b. Can the given information be correct? Why or why not?