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What is the minimal sample size needed for a 95% condence interval to have a maximal margin of error of 0.1 in the following scenarios?

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What is the minimal sample size needed for a 95% condence interval to have a maximal margin of error of 0.1 in the following scenarios? [For each answer, enter a number. Round your answers up the nearest whole number.) (a) a preliminaryr estimate for ,o is 0.31 |:| (b) there is no preliminary estimate forp |:| Need Help? _

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