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Estimation of Proportion Using Normal distribution

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In the last municipal election, a sample of 350 registered voters showed that 85 voted for the incumbants. Find a 98% confidence interval estimate for the proportion of all voters voting for the incumbants.

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Solution Summary

Population proportion is estimated using Normal distribution

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p= 0.2429 =85/350 =proportion of those who voted for the incumbents
q=1-p= 0.7571 = 1 - 0.2429 =proportion of those who did not vote for the incumbents
n= 350
s ...

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