Have you ever negotiated a pay raise? According to an Accenture survey

Have you ever negotiated a pay raise? According to an Accenture survey, 52% of U.S. workers have (1. Yang and K. Carter, "Have You Ever Negotiated a Pay Raise?", "Snapshots," w"\\'W.usatoday.com, May 22, 2009). a. Suppose that the survey had a sample size of n 500. Construct a 95% confidence interval for the proportion of all U.S. workers who have negotiated a pay raise. b. Based on (a), can you claim that more than half of all U.S. workers have negotiated a pay raise? c. Repeat parts (a) and (b), assuming that the survey had a sample size of n 5,000. d. Discuss the effect of