Unformatted text preview: h respect to two attributes, e.g sex and
employment, then population are first classified with respect to
‘ sex’ into ‘ males’ and ‘ females’ . Each of these classes may then
be further classified into ‘ employment’ and ‘ unemployment’ on the
basis of attribute ‘ employment’ and as such Population are
classified into four classes namely.
(i) Male employed
(ii) Male unemployed
(iii) Female employed
(iv) Female unemployed
Still the classification may be further extended by
considering other attributes like marital status etc. This can be
explained by the following chart
Population Male Employed Unemployed Female Employed Unemployed d) Quantitative classification:
Quantitative classification refers to the classification of data
according to some characteristics that can be measured such as
height, weight, etc., For example the students of a college may be
classified according to weight as given below.
40 Weight (in lbs)
Total No of Students
1000 In this type of classification there are two elements, namely
(i) the variable (i.e) the weight in the above example, and (ii) the
frequency in the number of students in each class. There are 50
students having weights ranging from 90 to 100 lb, 200 students
having weight ranging between 100 to 110 lb and so on.
Tabulation is the process of summarizing classified or
grouped data in the form of a table so that it is easily understood
and an investigator is quickly able to locate the desired information.
A table is a systematic arrangement of classified data in columns
and rows. Thus, a statistical table makes it possible for the
investigator to present a huge mass of data in a detailed and orderly
form. It facilitates comparison and often reveals certain patterns in
data which are otherwise not obvious.Classification and
‘ Tabulation’ , as a matter of fact, are not two distinct processes.
Actually they go together. Before tabulation data ar...
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