How many trials to poll a proportion
You will estimate a proportion whose true value is around . You need the standard error of to be at most . What is the smallest number of independent trials that achieves this?
Show hints (2)+
- Set sqrt(p(1-p)/n) <= 0.02 and square both sides to free n.
- With p(1-p) = 0.25, n >= 0.25 / 0.02^2.
Answer
Reveal answer →Final answer
625
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