12. What is the class size?
A. 7 B. 8 C. 9 D. 10
13. What is N?
A. 30 B. 40 C. 45 D. 50
14. What is frequency of the median class?
A. 9 B. 15 C. 8 D. 5
15. What is the class interval of the median class?
A. 30-39 B. 40-49 C. 50-59
D. 60-69
16. What is the lower limit of the median class?
A. 19.5 B. 29.5 C. 39.5 D. 49.5
17. What is the cumulative frequency of the median class?
A. 12 B. 27 C. 35 D. 40
18. What is the frequency of the modal class?
A. 3 B. 9 C. 15 D. 8
19. What is the class interval of the modal class?
A. 60-69 B. 50-59 C. 40-49
D. 30-39​