The total number of hours per week of 15 university students in using the notebook computers in Hong Kong are collected as follows (Q1 to Q5). Student No 2 |3 4 5 6 8 9 10 11 12 13 14 15 Total Hours 8 14 28 |22 21 23 30 16 11 13 18 22 21 12 15 The second quartile of total hours for the above students would be: OA. 19 O B. 15 OC. 16 O D. 18 O E. 21 QUESTION 2 The coefficient of variation of total hours for the above students would be: O A. 0.3453 B. 0.1295 C. 0.0179 O D. None of the answers given O E. 0.2487The central location of the total hours for the above students could be indicated by the figure: O A. 10.3824 O B. 18.2667 O C. None of the answers given O D.21.3525 O E. 15.5000 QUESTION 4 The 75th percentile of the total hours for the above students would be: O A. None of the answers given O B. 21.0 OC. 17.5 O D. 20.5 O E 18.0QUESTION 5 The semi-interquartile range of the total hours for the above students would be: O A 4.5 O B. 5.5 O C.6 O D.5 O E. 6.5