The drug Ziac is used to treat hypertension. In a clinical test, 3.2% of 221 Ziac users

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The drug Ziac is used to treat hypertension. 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.
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 in parts (a) and (b), what can we conclude about dizziness as an adverse reaction to Ziac?
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Elementary Statistics

ISBN: 9780321225979

3rd Canadian Edition

Authors: Mario F. Triola

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