For items 11-15: Refer to the frequency distribution of math scores.
|————————————————
|52| 61| 91| 41| 40| 72| 70| 75| 65|
|88|55|62|58| 98| 90| 45| 71| |
|95|40|85|66| 87| 77| 36 |85| |
|————————————————
11. What is the range of the data?
a. 62
b. 75
c. 72
d. 52
12. Find the class size when number of classes required is 9.
a. 8
b.7
c. 6
d. 9
13. What is the frequency of class interval 36-42?
a. 3
b.4
C.5
d.7
14. Find the frequency of the interval 71-77.
a. 3
b. 4
c. 5
d. 7
15. How many took the test?
a. 25
b. 35
c. 30
d. 20

16. In the class interval 6-12, what is the lower limit?
a. 6
b. 12
c. 9
d. 7

17. The upper limit in the interval 20-29 is
a. 20
b. 29
C. 24.5
d. 10

18. In 56-58, the class size is
a. 56
b. 58
c. 3
d. 57​