College officials want to estimate the percentage of students who carry a gun, knife, or other such weapon. How many randomly selected students must be surveyed in order to be 98% confident that the sample percentage has a margin of error of 2 percentage points? (a) Assume that there is no available information that could be used as an estimate of p. Answer: (b) Assume that another study indicated that 4% of college students carry weapons. Answer: ☐

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