Correct Answer - Option 1 : 63-65
Concept:
- Cumulative frequency distribution is the sum of the frequency of class and all classes below it in a frequency distribution.
- This means we can get cumulative frequency by adding up a value and all of the values that came before it.
Also,
Frequency of any class=cumulative frequency of class - cumulative frequency of preceding class.
Calculation:
From the above discussion, we can calculate the frequency from the cumulative frequency as below.
Class |
Cumulative frequency |
frequency |
60 - 62 |
3 |
3 |
63 - 65 |
20 |
17 |
66 - 68 |
36 |
16 |
69 - 71 |
48 |
12 |
72 - 74 |
50 |
2 |
Clearly, from the above table, we can see that the 63 - 65 class has a maximum frequency.