SOLUTION: In a survey of 250 Voters prior to the election, 16% indicated that they would vote for the ABC candidate. Estimate with 90% confidence the population proportion of voters who supp

Question 1177087: In a survey of 250 Voters prior to the election, 16% indicated that they would vote for the ABC candidate. Estimate with 90% confidence the population proportion of voters who support the ABC.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the half-interval is z(0.95)*sqrt(p*(1-p)/n)
=1.645*sqrt(.16*.84/250)
=0.038
The interval is (0.122, 0.198), equidistant from the point estimate of 16%
A tree diagram would be very difficult with 250 voters.
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