For numbers 13-16 please refer to the table below.
Class Interval
X
IX
22-24
23
92
18-21
20
140
16-18
12
221
13-15
14
10-12
5
11
55
13. What is the ?
a 30
b. 35
c. 40
d. 45
14. What is the fir?
a 382
b. 492
c. 592
d. 682
15. What is the mean score of the data?
a 15.61
b. 16.91
c. 17.81
d. 18.71
16. 14 Which of the following class intervals contains the median class?
a. 10-12
b. 13-15
c. 16-18
d. 19-21​