Question: Sample Size for Weapons on Campus Concerned about campus safety, college officials want to estimate the percentage of students who carry a gun, knife, or

Sample Size for Weapons on Campus Concerned about campus safety, 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 95%

confident that the sample percentage has a margin of error of three percentage points?

a. Assume that another study indicated that 7% of college students carry weapons

(based on a study by Cornell University).

b. Assume that there is no available information that can be used to estimate the percentage of college students carrying weapons.

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