Looking For Information
Chapter Name : Data Handling |
Sub Topic Code : 104_08_05_01_01 |
Topic Name : Looking For Information |
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Sub Topic Name : Looking For Information |
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Introduction
How a numerical data can be interpreted into data handling methods.
Pre-Requisites:
Basic knowledge about numbers and interpretation of numbers
Activity:
The interpretation of numerical data into bar graphs and pictographs by representing the sum of numbers the student collects from the urn. The heights of each bar depends on the points collected by respective students.
Real Life Question:
How are the sales of a particular company this year?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Pictograph | A representation of numerical data by using pictures |
| Bar graph | A representation of numerical data by using single bars of equal width and different heights. |
| Double Bar graph | A representation of numerical data by using double bars of equal widths and different heights used for comparing data. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Ice cream sticks, numbered coins | Take an urn and place numbered coins in them. Ask students to take three coins and sum up the numbers and collect ice cream sticks. Represent them using bar graphs and pictographs |
Real life uses :
Surveys, sales, predictions, reliability of a product, results, rates
Places to visit :
Stock exchange building
Practical examples around us
| Examples | Explainations |
|---|---|
| survey | The statistics of a survey are compared using pictorial representations. |
| Sales of products | The annual sales of products are represented graphically to show the increase or decrease in the number of sales. |
What you learn in Theory:
The numerical data is represented into pictorial representations using pictographs, bar diagrams and double bar diagrams to interpret and compare them easily.
What you learn in Practice:
Each student has different points which can be plotted in a pictograph by taking n number of sticks to be one unit and representing them. Bar graphs are made by defining n number of sticks to be unit height. Using double bar graphs, the points of various students can be compared.