SOLUTION: A random sample of 100 voters found that 42% were going to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidat

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Question 727968: A random sample of 100 voters found that 42% were going to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
A) 29.3% < p < 54.7% C) 32.3% < p < 51.7%
B) 30.8% < p < 53.2% D) 35.6% < p < 48.4%
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A random sample of 100 voters found that 42% were going to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
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p-hat = 0.42
E = z*s/sqrt(pq/n) = 2.5758*sqrt[0.42*0.58/100] = 0.1271
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98% CI: 0.42-0.1271 < p < 0.42+0.1271
Ans: A
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Cheers,
Stan H.
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A) 29.3% < p < 54.7% C) 32.3% < p < 51.7%
B) 30.8% < p < 53.2% D) 35.6% < p < 48.4%