1-Types of diagrammatic presentation of Data, BAR and its Features
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Learning Outcomes:- Through this
module, you will gain understanding on:- 1.
Names of Types of diagrammatic presentation of Data 2.
Bar diagrams - a kind of Geometric form 3.
BAR and its Features 4. Types of BAR DIAGRAMS |
Names of…
Types of diagrammatic presentation -
|
1. Geometric form ● Bar diagrams ● Pie Diagrams |
2. Frequency diagrams ● Histogram ● Polygon ● Ogive |
3.
arithmetic line-graphs OR Time Series Graphs |
(A) Geometric
form of diagrammatic presentation of data -
(A-1) Bar Diagrams
●
In
which data are presented in form of bars or rectangles
● Bars are also called Columns
BAR and its Features -
●
Rectangular
form
●
Length
(height) of bars differs according to different values of variable
●
Breadth
(width) of bars remains the same
●
Bars
may be either vertical (usually) or horizontally placed
●
Bars are equidistant (समान दूरी पर स्थित) from each other
●
Baseline
for all bars is common
●
Data
should be presented to form bars of ascending or descending order
Types of BAR DIAGRAMS -
(A-1-i) Simple Bar Diagrams -
●
Are
based on single set of numerical data
●
More
useful to present
○
time
series data such as Birth rate, death rate according to census surveys
○
Individual
value like Weight of students
○
Geographical
conditions like per capita income in different states
A-1-i Simple
Bar Diagram (vertical)
# Birth Rate in India according to Census
Survey of different Years -
(single set of data)
A-1-ii
Simple Bar Diagram (horizontal)
# Marks Obtained by different Categories of Students -
(A-1-ii) Multiple Bar Diagrams -
●
Show
behaviour of two or more sets of data simultaneously
●
Generally
used to make comparison between two set of series
●
Separate
Bars are drawn to present separate sets of values
●
Bars
are differentiated by colors
# Birth & Death Rate in India as per Census Reports b/w 1971-80 to 2013-14 (per thousand)-
(A-1-iii) Sub-divided OR Differential Bar
Diagrams -
●
present
total value as well as part values of a data set, simultaneously
● Different parts of each bar are shaded with colours for differentiation
●
Percentage
bar diagram is generally used when values are of high magnitude
(A-1-iv) Percentage Bar Diagrams -
●
A
form of Sub-divided Bar Diagram
●
Show
different Part Values of a Data Set in Percentage Terms
●
Total
Value (Total Bar Length) is assumed to be 100
●
Each
Part Value is shown as a Part of 100
● Parts may be shaded with different colours to highlight the difference
(A-1-v) Deviation Bar Diagrams - related
●
Used
to compare the net deviation of related variables with respect to time and
location
●
Bars
representing Positive deviations = drawn Above baseline
●
Bars
representing Negative deviations = drawn Below baseline
● Represent deviations in magnitude as well as in direction
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