How large a sample of students should you take

Reference no: EM131427381

Sample size needed for an evaluation. You are planning an evaluation of a semester-long alcohol awareness campaign at your college. Previous evaluations indicate that about 25% of the students surveyed will respond "Yes" to the question "Did the campaign alter your behavior toward alcohol consumption?"

How large a sample of students should you take if you want the margin of error for 95% confidence to be about 0.1?

Reference no: EM131427381

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