The table below brings the time spent (in minutes) on the graded practice exam 1 and the scores of 10 randomly selected ECN 221 online students. time spent (in mins) Grade (out of 10) 16 5 34 7 10 7 27 6 10 9 33 9 23 5 11 2 13 5 10 9 Calculate the coefficient of variation (in %) for the variable time spent in minutes. Use variance = 135.73 Round your final answer to the nearest integer. E.g., 8.4 ~ 9; 8.7 ~ 9 No credit will be given for rounding mistakes