NCERT Solutions: Data Handling (Exercise 9.4)

# NCERT Solutions for Class 8 Maths - Data Handling (Exercise 9.4)

## Exercise 9.4 (Old NCERT)

Question 1)

A survey of 120 school students was done to find which activity they prefer to do in their free time.

 Preferred activity Number of students Playing 45 Reading story books 30 Watching TV 20 Listening to music 10 Painting 15

Draw a bar graph to illustrate the above data taking scale of 1 unit length = 5 students. Which activity is preferred by most of the students other than playing?

Reading story books is the activity preferred by most of the students other than playing.

Question 2)

The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below:

 Days Number of books sold Sunday 65 Monday 40 Tuesday 30 Wednesday 50 Thursday 20 Friday 70

Draw a bar graph to represent the above information choosing the scale of your choice.

Question 3)

Following table shows the number of bicycles manufactured in a factory during the years 1998 to 2002. Illustrate this data using a bar graph. Choose a scale of your choice.

 Years Number of bicycles manufactured 1998 800 1999 600 2000 900 2001 1100 2002 1200

(a) In which year was the maximum number of bicycles manufactured?

(b) In which year was the minimum number of bicycles manufactured?

(a) The maximum number of bicycles were manufactured in 2002.

(b) The minimum number of bicycles were manufactured in 1999.

Question 4)

Number of persons in various age groups in a town is given in the following table.

 Age group 1 - 14 15-29 30 - 44 45-59 60 -74 75 & above Number of persons 2 lakhs 1 lakhs60 thousands 1 lakh20 thousands 1 lakh20 thousands 80 40Thousands

Draw a bar graph to represent the above information and answer the following questions. (take 1 unit length = 20 thousands)

(a) Which two age groups have same population?

(b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?

(a) Group 30 – 44 and group 45 – 59 have the same population.

(b) Senior citizens are the persons between the age group either from 60 - 74 or from 75 above. Therefore,

Number of senior citizens in town = 80000 + 40000

= 1 lakh 20 thousand

The document NCERT Solutions for Class 8 Maths - Data Handling (Exercise 9.4) is a part of the Class 6 Course NCERT Textbooks & Solutions for Class 6.
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## FAQs on NCERT Solutions for Class 8 Maths - Data Handling (Exercise 9.4)

 1. What is data handling?
Ans. Data handling refers to the process of organizing, managing, and analyzing data to extract meaningful insights and make informed decisions.
 2. Why is data handling important?
Ans. Data handling is important because it helps in understanding trends, patterns, and relationships in the data, which can be used to make informed decisions and improve efficiency in various industries and sectors.
 3. What are the steps involved in data handling?
Ans. The steps involved in data handling include data collection, data cleaning, data analysis, data interpretation, and data visualization. These steps help in organizing and making sense of the data.
 4. What are some common data handling techniques?
Ans. Some common data handling techniques include data sorting, filtering, grouping, summarizing, and statistical analysis. These techniques help in analyzing and interpreting the data effectively.
 5. How can data handling benefit businesses and organizations?
Ans. Data handling can benefit businesses and organizations by providing insights into customer behavior, market trends, and operational efficiency. It can help in identifying potential areas for improvement, optimizing processes, and making data-driven decisions for growth and success.

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