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What is the cumulative frequency
before the 31 - 35 class interval?
* 2 puntos
Class Interval of
the Scores
Frequency
Lower
Boundaries (LB)
Cumulative Frequency
(cf)
36-40
35.5
40
31-35
30.5
36
26-30
25.5
28
21-25
7
20.5
18
16-20
632
15.5
11
10.5
5.5
5
2
○ 28
○ 10
○ 36
○ 8



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