Exercise 6 An elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. Rachel, a student. in the class, ran 1 mile in 8 minutes. A junior high school class ran 1 mile in an average of 9 minutes, with a standard deviation of 2 minutes. Kenji, a student in the class, ran 1 mile in 8.5 minutes. A high school class ran 1 mile in an average of 7' minutes with a standard deviation of 4 minutes. Nedda, a student. in the class, ran 1 mile in 3 minutes. a. 'th,r is Kenji considered a better runner than Nedda, even though Nedda ran faster than he? I). Who is the fastest runner with respect to his or her class? Explain why