This document discusses types of cumulative frequency (cuf) in data classification. It explains that less than (<) cuf is the accumulated frequency starting from the lowest data class, where the frequency of each subsequent class is added to the previous classes. Greater than (>) cuf is the accumulated frequency starting from the highest data class, where the frequency of each preceding class is added. An example shows how the < cuf is calculated by adding the frequencies of the first two lowest classes.

3.  frequency of
the first-class
interval is
added to the
frequency of
the second
class, and this
sum is added
to the third
class and so on

4. Types of Cuf:
< (less than) cuf –
accumulated
frequency starting
from the lowest class.
> (greater than) cuf
– accumulated
frequency starting
from the highest class
Lowest
class
highest
class

5. Types of Cuf:
< (less than) cuf –
accumulated
frequency starting
from the lowest class.
6 + 4 = 10

6. Types of Cuf:
< (less than) cuf –
accumulated
frequency starting
from the lowest class.
6 + 4 = 10