Suppose you want to estimate the proportion p of voters who will vote for John Curtis, a candidate for the US Congress, in the next election. How large does the sample need to be to estimate p with a margin of error of 0.04 with 98% confidence? 847 845 601 846 600
Added by Michael M.
Step 1
Since we are estimating a proportion, we will use the formula: n = (z^2 * p * q) / E^2 where: - n is the sample size we need - z is the z-score corresponding to the desired level of confidence (98% in this case) - p is our estimate of the proportion we are Show more…
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