Question 9 (10 points) Range Frequency In) 1-10 2 11-20 7 21-30 10 31-40 3 41-50 For this data, what is the Coefficient of variation? (Rounded to the 10th). Assume data is from a population. CV=Two sample classes are drawn in a school and each is given a test. The results are: Math: Average score = 100, variance = 25 English : Average score = 106, variance = 49 What is the correct value of coefficient of variation for the two classes? O a Math 5%, English 6.6% Ob Math 5%, English 6% OC Math 20%, English 15.4% O d Math 5%, English 15.4%