A university president wants to know whether seniors or fres…
A university president wants to know whether seniors or freshmen use the campus library more. A sample of 200 seniors yielded 104 who regularly use the library, and a sample of 150 freshmen yielded 63 who regularly use the library. Calculate a 95% confidence interval for the difference in the population proportion of seniors and freshmen who regularly use the campus library. Calculate (seniors – freshmen). (Input your interval as “(a, b)”, where a is the lower limit and b is the upper limit of the interval). (Round to 3 decimals).