#4 thanks in advance

4. Suppose the number of incoming freshmen is always made up of at least 6000 students. Suppose in 2015, of a SR5 of 100 incoming freshmen, 20 nished in the bottom third of their high school class. Admission standards at the university were revised in 2017. In 2019, of a SR5 of 100 incoming freshmen, 10 finished in the bottom third of their high school class. Let p1 and p: be the proportion of all entering freshmen in 2015 and 2019, respectively, who graduated in the bottom third of their high school class. Using the Wilson (plus 4} estimation, a 90% confidence intewal for p1 p2 is