Question

An experiment on the side effects of pain relievers assigned arthritis patients to take one of several over-the-counter pain medications. of the 425 patients who took one brand of pain reliever, 20 suffered some "adverse symptom." does the experiment provide strong evidence that fewer than 11% of patients who take this medication have adverse symptoms?

Answer 1

yes, 20/425 = .047 or 4.7%
The total that had an adverse symptom was 20 out of 425. create a fraction to find the percentage of the patients that have an adverse symptom. 20/425 is 0.047 or 4.7% had an adverse effect.