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Encapsulate
math

DATA HANDLING

A data is a collection of numbers, figures, observations gathered to give some information.

Types of Data Recording Data

1. Primary Data: The data collected directly from A process of collecting accurate and reliable
the source is known as primary data. data from various sources such as surveys,
2. Secondary Data: The data derived from the experiments.
primary data is called secondary data.
Pictorial Representation of Data
Organising Data
Pictograph
When numerical data is represented by picture
Arranging raw data systematically, so that it will be symbols, objects or part of objects is called a
easy to read and analyse.
pictograph.
House Number of students
Some Important Definitions
1. Tally Marks: The vertical lines or bars (|) which Takshashila
are used to represent frequency of an observation Nalanda
is called tally marks. Vallabhi
2. Frequency: The number of times an observation
is repeated or occurred is called the frequency Vikramashila
of that observation. Key: 1 = 50 students
3. Frequency Distribution Table: The distribution
of frequency of various observations in the form
of a table is called a frequency distribution table. Bar Graph
Game Tally marks Number of A bar graph is the graphical presentation of
students data using rectangular bars of equal width and
varying heights.
Ludo | 6
Chess 5
Checker ||| 8

Carrom |||| 9
Total 28

Brain Sizzlers

Thirty-six students were counselled to find out what they want to be in the future. Their responses
are listed below:
Politician, doctor, engineer, doctor, pilot, politician, officer, doctor, engineer, politician, doctor, pilot, officer, pilot,
politician, engineer, officer, pilot, doctor, engineer, pilot, officer, politician, doctor, officer, doctor, pilot, engineer, doctor,
pilot, officer, doctor, pilot, doctor, engineer, politician
Arrange the data in a table using tally marks and then represent it through a pictograph or a bar graph.

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