Question

Near the time of an election, a cable news service performs an opinion poll of 900 probable voters. It shows that the Republican contender has an advantage of 51% to 49%.
a. Develop a 98% confidence interval for the proportion favoring the Republican candidate. (Round your answers to 3 decimal places.)

b. Estimate the probability that the Democratic candidate is actually leading. (Round your answer to 4 decimal places.)

c. Repeat the above analysis based on a sample of 4,600 probable voters. (Round your interval to 3 decimal places and Probability to 4 decimal places.)
Confidence interval and Probability

Answer 1

a)

b)

c)