Question 4 The CAOS (Comprehensive Assessment of Outcomes in Statistics) exam is an online multiple-choice test on concepts covered in a typical introductory statistics course. before the start of the course and another version after the course ends. Before and After scores for a possible random sample of 10 students are shown in the table. Save Answ 5 points Students take one version Student A B D IG H Before 43 40 48 65 60 48 43 38 43 55 After 60 45 55 30 35 71 52 35 54 55 Find the differences (After Before) for all ten students. Find the mean, standard deviation, and sample size for the differences. O a. 10.9, 8.46, 10 O b. 48.3, 9.19, 20 Oc. 10.9, 9.22, 10 O d. 29.6, 8.42, 20