Answer:
Class interval _ Frequency __cumm /frequency
26 - 23 _________ 2 _______ 2
22 - 19 __________5 ________7
18 - 15 __________ 9 _______ 16
14 - 11 __________ 10 _______26
10 - 7 ___________4 _______ 30
Step-by-step explanation:
Given the data:
12 16 17 14 15 17 19 21 23 26 13 19 11 12 13 15 18 20 18 12 16 17 22 14 7 8 9 8 12 11
Rearranged data:
7, 8, 8, 9, 11, 11, 12, 12, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 18, 18, 19, 19, 20, 21, 22, 23, 26
Using a class interval of 4 ; and arranging in descending order :
Class interval _ Frequency __cumm /frequency
26 - 23 _________ 2 _______ 2
22 - 19 __________5 ________7
18 - 15 __________ 9 _______ 16
14 - 11 __________ 10 _______26
10 - 7 ___________4 _______ 30
