A random sample of 80 voters found that 46% were going to vote for a certain candidate. Find the 95% limit for the population proportion of voters who will vote for that candidate.
A) 35.1%

Question

A random sample of 80 voters found that 46% were going to vote for a certain candidate. Find the 95% limit for the population proportion of voters who will vote for that candidate.
A) 35.1% < p < 56.9%
B) 36.0% < p < 56.0%
C) 36.8% < p < 55.2%
D) 40.5% < p < 51.5%

Quizplus · Accepted Answer

The 95% confidence interval is:0.46 +/- 1.96 * sqrt(0.46 * 0.54 / 80)= 0.46 +/- 0.108= (0.351, 0.569)

A Random Sample of 80 Voters Found That 46% Were