Would you use the library more if the hours were extended? From a random sample of 138 freshmen, 80 indicated that they would use the school’s library more if the hours were extended. In an independent random sample of 96 sophomores, 73 responded that they would use the library more if the hours were extended. Estimate the difference in proportion of first-year and second-year students responding affirmatively to this question. Use a 95% confidence level.