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Question: what must be true about the sampling method and the...

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What must be true about the sampling method and the values of p and n in order to construct a confidence interval for a proportion? Why is 0.5 used in place of p when determining the minimum sample size necessary for a proportion confidence interva Why should you be wary of surveys that do not report a margin of error? pg Why is 1/ used in the margin of error formula? Where does it come from n,

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