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Joe Kennedy wants to be elected Senator to replace Senator Markie. He wants to be 9%...

Joe Kennedy wants to be elected Senator to replace Senator Markie. He wants to be 9% certain of his results with a margin of error of no more than 2%.


a) In no preliminary survey was conducted, how many people across the state need to be randomly surveyed?
b) If a preliminary survey showed 40% like him, how many people need to be surveyed.

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