DATA HANDLINGCLASS VI

PREPARED BY TANVEER AHMED

T.G.T.(MATHS)K.V. SECT-25 ROHINI,

DELHI

DATALet us take an example of a class which is preparing to go for a picnic. The teacher asked the students to give their choice of fruits out of

Let us take an example of a class which is preparing to go for a picnic. The teacher asked the students to give their choice of fruits out of banana

Let us take an example of a class which is preparing to go for a picnic. The teacher asked the students to give their choice of fruits out of banana apple

Let us take an example of a class which is preparing to go for a picnic. The teacher asked the students to give their choice of fruits out of banana

apple orange

Let us take an example of a class which is preparing to go for a picnic. The teacher asked the students to give their choice of fruits out of banana apple orange or guava

Uma is asked to prepare the list. She prepared a list of all the children and wrote the choice of fruit against each name. This list would help the teacher to distribute fruits according to the choice

Raghav — Banana Bhawana — ApplePreeti — Apple Manoj — BananaAmar — Guava Donald — AppleFatima — Orange Maria — BananaAmita — Apple Uma — OrangeRaman — Banana Akhtar — GuavaRadha — Orange Ritu — AppleFarida — Guava Salma — BananaAnuradha -Banana Kavita — Guava Rati — Banana Javed — Banana

Similarly, in your day to day life, you must have seen several kinds of tables consisting of numbers, figures, names etc.1.The heights of the students of your class.

Similarly, in your day to day life, you must have seen several kinds of tables consisting of numbers, figures, names etc.1.The heights of the students of your class.2.Records of marks of all the students .

Similarly, in your day to day life, you must have seen several kinds of tables consisting of numbers, figures, names etc.1.The heights of the students of your class.2.Records of marks of all the students 3.The score of the player in the game.These tables provide data.

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

There are two types of data:-(a)Primary data:-when the

information are collected by the investigator herself or himself, the data obtained is called primary data.

(b)secondary data:-when the information are gathered from a source which already had the information stored ,the data obtained is called secondary data.

Organisation of dataChoic

e Tally

marksNumbe

r of studen

tsIIIIII

Organisation of dataChoice Tally marks Number

of students

IIII III 8IIII 5III 3IIII 4

TOTAL 20

PICTOGRAPHA pictograph

represents data through pictures of

object . It helps answer the questions

on the data at a glance

Fruits Number of students = 1 student

*Which fruits is most liked by the students?*Which fruits is least liked by the students?* How many students are there in the class?

(a) On which months were the least number of cars sold?(b) On which months were the maximum number of cars sold?(c)Find out the approximate number of cars sold in the four months?

Months

Number of cars 10 car

JanuaryFebruaryMarchApril

Making Pictograms

Red 50Black 35Green 15Silver 20Blue 45Yellow 10

This table shows the colour of cars in a car park. Make a pictogram.

Look at the numbers.Choose the best unit.

1 picture = cars10

The colour of carsRed 50Black 35Green 15Silver 20Blue 45Yellow 10

Key:1 picture = cars10

50 ÷ 10 = 5

Red

Black

Green

Silver

Blue

Yellow

The colour of carsRed 50Black 35Green 15Silver 20Blue 45Yellow 10

35 ÷ 10 = 3½

Red

Black

Green

Silver

Blue

Yellow

Key:1 picture = cars10

The colour of carsRed 50Black 35Green 15Silver 20Blue 45Yellow 10

15 ÷ 10 = 1½

Red

Black

Green

Silver

Blue

Yellow

Key:1 picture = cars10

Red 50Black 35Green 15Silver 20Blue 45Yellow 10

45 ÷ 10 = 4½

Red

Black

Green

Silver

Blue

Yellow

Key:1 picture = cars10

The colour of cars

The colour of carsRed 50Black 35Green 15Silver 20Blue 45Yellow 10

10 ÷ 10 = 1

Red

Black

Green

Silver

Blue

Yellow

Key:1 picture = cars10

The colour of carsRed

Black

Green

Silver

Blue

Yellow

Key:1 picture = cars10

What is the least popular car colour in the car park?

BAR GRAPH Representing data by pictograph is not only

time consuming but at times difficult too. Let us see some other way of representing data visually.

Bars of uniform width can be drawn horizontally or vertically with equal spacing between them and then the length of each bar represents the given number. Such method of representing data is called a bar diagram or a bar graph.

Look at the way a bar chart is constructed. Can you name its different parts?

What is this called?

What do we call this?

What is this?

Horizontal axis (x). Always labelled.

Vertical axis (y). Always labelled and numbered.

A bar chart always has a

title.The height of the bars show how many of something was scored/recorded.

Can you read the answers?

Flavours

Num

ber

of c

hild

ren

Favourite Crisps

Salt and vinegar

Cheese and onion

Prawn cocktail

Ready salted

Bacon Worcester sauce

Barbeque

What does this bar chart show?How many children were surveyed?Which is the favourite flavour?Which is the least liked?What intervals are used on the y axis?What intervals could you use if twice as many children were surveyed?

0

1

234567

8

THANKS