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The head of a computer science department is interested in estimating the proportion of students entering the department who will choose the new computer

The head of a computer science department is interested in estimating the proportion of students entering the department who will choose the new computer engineering option. Suppose there is no information about the proportion of students who might choose the option. What size sample should the department head take if she wants to be 99% confident that the estimate is within 0.10 of the true proportion?

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