Types of table:
Two way or double table:
Statistical tables are classified in two types:
i. General purpose table:
General purpose table also known as primary or reference table contain detailed statistical information about the variety of problems and published for reference purposes. These tables are available to others, who want to use them for analysis of special problems. These tables contain primary information’s and do not contain computed measures such as rate, ratios, averages etc.
ii. Special or specific purpose table:
Special purpose table also known as text table or summary table or analytical table are tables used to analyses the special problems under study. E.g. production figure of a particular industrial unit for a number of years or the figure relating to its profit would give us specific or special purpose table.
One way or simple table:
A table in which observations are classified according to single characteristic (variable) is called the one way or simple table. E.g. marks obtained by students in statistics are shown below.
Marks obtained by students in statistics:
Two way or double table:
A table which gives information’s about the two inter-related characteristics (variable) is called two ways or double table. The marks obtained and sex wise distribution of 100 students is an example of two way table and is shown below.
Marks obtained by students in statistics (sex wise):
No. of student
| |||
Marks
|
Male
|
female
|
total
|
40-50
|
8
|
6
|
14
|
50-60
|
16
|
10
|
26
|
60-70
|
14
|
16
|
30
|
70-80
|
12
|
8
|
20
|
80-90
|
6
|
4
|
10
|
Total
|
56
|
44
|
100
|
Three way tables:
A table which gives information’s about the three inter-related characteristics (variable) is called three way tables. The marks obtained by students sex wise and on the basis of residential status is an example of three way table. Consider the following.
Mark obtained by students in statistics sex wise and on the basis of residence:
Marks
|
No. of students
|
Total
| ||||||||
Male
|
Female
|
Total
| ||||||||
Hostellers
|
Day scholar
|
Total
|
Hostellers
|
Day scholar
|
total
|
hostellers
|
Day scholar
| |||
40- 50
|
4
|
4
|
8
|
4
|
2
|
6
|
8
|
6
|
14
| |
50 – 60
|
10
|
6
|
16
|
5
|
5
|
10
|
15
|
11
|
26
| |
60 – 70
|
8
|
6
|
14
|
9
|
7
|
16
|
17
|
1
|
30
| |
70 – 80
|
7
|
5
|
12
|
5
|
3
|
8
|
12
|
8
|
20
| |
80 – 90
|
5
|
1
|
6
|
2
|
2
|
4
|
7
|
3
|
10
| |
34
|
22
|
56
|
25
|
19
|
44
|
41
|
41
|
100
| ||
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