A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 5% margin of error at a 99%
confidence level, what size of sample is needed?
Give your answer in whole people.
Solution:- The needed sample size is 664.
p = 0.50
M.E = 0.05, C.L = 99%
n = 663.58
n = 664
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