There are three types of frequency distributions -
(i) Individual Series : In individual series, the frequency of each item or value is only one for example ;marks scored by 10 students of a class are written individually.
(ii) Discrete Series : A discrete series is that in which the individual values are different from each other by a different amount.
Daily wages 5 10 15 20
No. of workers 6 9 8 5
(iii) Continuous Series : When the number of items are placed within the limits of the class, the series obtained by classification of such data is known as continuous serise
Marks obtained 0-10 10-20 20-30 30-40
No.of students 10 18 22 25
Difference between Exclusive and Inclusive Series
|Exclusive Series||Inclusive Series|
|Limits||Upper limit of one class is equal to the lower limit of next class||The two limits are not equal|
|Inclusion||The value equal to the upper limit is included in the next class.||Both upper & lower limits are included in the same class. |
|Conversion ||It does not require any conversion.||Inclusive series is converted into exclusive series for calculation purpose.|
|Suitability||It is suitable in all situations.||It is suitable only when the values are in integers. |