Explore BrainMass
Share

Finding the confidence interval for a proportion in an election

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Prior to a statewide senate election, three polls are conducted concerning a particular candidate's popularity. In the first poll, 750 of 1500 voters favor the candidate. In the second poll, 1285 of 2520 favor the candidate. In the third poll, 1795 of 3500 voters favor the candidate. Find 95% confidence intervals for the proportion of voters in favor of the candidate for all three.
a) The 95% confidence interval for the first poll is ___<p < ___.
b) The 95% confidence interval for the second poll is ___<p < ___.
c) The 95% confidence interval for the third poll is ___<p < ___.
d) Does the confident interval includes values of les or more than 0.5?_____.

© BrainMass Inc. brainmass.com March 22, 2019, 12:46 am ad1c9bdddf
https://brainmass.com/statistics/confidence-interval/finding-confidence-interval-proportion-election-512621

Solution Summary

The solution finds the confidence interval for a proportion in an election.

$2.19