The Results of a Recent Poll on the Preference of Voters

Short Answer

The results of a recent poll on the preference of voters regarding the presidential candidates are shown below.
Voters Surveyed
Voters Favoring This Candidate
Candidate A 200 150
Candidate B 300 195
a. Develop a 90% confidence interval estimate for the difference between the proportion of voters favoring each candidate.
b. Does your confidence interval provide conclusive evidence that one of the candidates is favored more? Explain.