3
Question
Weight of the students in a class is represented in a grouped frequency.
Weight
(Kg) Frequency
(No. of students) 50 - 60 25 60 - 70 21 70 - 80 11
What is the Greater than type cumulative frequency of group having 25 frequency ?
Weight of the students in a class is represented in a grouped frequency.
| Weight (Kg) | Frequency (No. of students) |
| 50 - 60 | 25 |
| 60 - 70 | 21 |
| 70 - 80 | 11 |
What is the Greater than type cumulative frequency of group having 25 frequency ?
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Solution
The correct option is C 57
The progressive sum of the frequencies from the last class to the lower boundary of the particular data class is the Greater than Cumulative Frequency.
For example:- Weight
(Kg) Frequency
(No. of students) Cumulative Frequency 50 - 60 25 32 + 25 = 57 60 - 70 21 11 + 21 = 32 70 - 80 11 11 + 0 = 11
The progressive sum of the frequencies from the last class 70 - 80 to lower boundary 50 of the particular data class 50 - 60 is 57, so 57 is the Greater than Cumulative Frequency of group having 25 frequency.
The progressive sum of the frequencies from the last class to the lower boundary of the particular data class is the Greater than Cumulative Frequency.
For example:-
| Weight (Kg) | Frequency (No. of students) | Cumulative Frequency |
| 50 - 60 | 25 | 32 + 25 = 57 |
| 60 - 70 | 21 | 11 + 21 = 32 |
| 70 - 80 | 11 | 11 + 0 = 11 |
The progressive sum of the frequencies from the last class 70 - 80 to lower boundary 50 of the particular data class 50 - 60 is 57, so 57 is the Greater than Cumulative Frequency of group having 25 frequency.
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