Graphic Representation Of Data
Chapter Name : Statistics |
Sub Topic Code : 104_09_14_04_01 |
Topic Name : Graphic Representation Of Data |
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Sub Topic Name : Graphic Representation Of Data |
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Introduction
“One picture is better than a thousand words.” We can very easily compare results by viewing the data represented in graphical form as compared to the tabular form.
Pre-Requisites:
Idea about tables, graphs, collection and presentation of data.
Activity:
Conduct a survey, collecting data on number of students in various classes of your school and draw the bar graph and histogram for it.
Real Life Question:
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Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Frequency Polygon | It is a visual way of representing quantitative data and its frequencies through polygons. |
| Histograms | Histogram is a form of representation like the bar graph, but it is used for continuous class intervals. |
| Graphical Representation of Data | The transformation of data through visual methods like graphs, diagrams, maps and charts is called graphical representation of data. |
| Bar Graph | A bar graph is a pictorial representation of data in which usually bars of uniform width are drawn with equal spacing between them on one axis (say, the x-axis), depicting the variable. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Graphs | Use them to draw bar graphs, histograms and frequency polygons. |
Real life uses :
Graphical representation of data makes it easy to understand the patterns of population growth, distribution and the density, sex ratio, age–sex composition, occupational structure, etc.
Places to visit :
Cricket
match – Score board
Practical examples around us
| Examples | Explainations |
|---|---|
| 1. Marketing | Marketers often use statistical graphics to present their presentations. From the figures, they show how their product is better from others by comparing the usage by people of the products in the specific period of time. Thus it saves their time much and also attracts buyers to buy their product. |
| 1. Cricket Matches | In cricket matches, we often see bar charts, pie charts, frequency polygon of players’ score. These are used to compare scores of the two teams or two players. |
What you learn in Theory:
What are bar graphs, histograms and frequency polygons?
What you learn in Practice:
How to represent data in the form of bar graphs, histograms and frequency polygons.