A poll was taken every month on how voters will vote on the next federal election Sample Size Number of Voters Voting Liberal This month 750 300 Last...

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1. Develop a 95% confidence interval estimate for the difference between the proportions of voters who will vote for the Liberals in the two samples?

2. Is there conclusive evidence that one of the proportions is significantly different from the other? Explain using the results of part a. Do not perform any test?