'8. You are asked to estimate the proportion (p) of voters who will support candidate A in the next senate election in your area How many people should you sample s0 that p can be estimated with 95% confident and 3% margin of error?'
Added by Manuel B.
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We are given a 95% confidence level, which means that the z-score corresponding to this confidence level is 1.96 (from the standard normal distribution table). Show more…
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