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You intend to poll students in order to determine the proportion of all students who will vote in an upcoming election.

Please help with this problem: You intend to poll students in order to determine the proportion of all students who will vote in an upcoming election. What sample size do you need to choose to ensure that the margin of error is less than 2% assuming a 95% level of confidence? Hint: "To ensure" means that, even in the worst case scenario which is when the variation is largest, your confidence interval would still have a 95% chance of containing the true proportion of all students.  

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