NCERT Solutions for Class 7 Maths Chapter 3 - Data Handling

NCERT Class 7 Maths Chapter 3 Data Handling - Key Points at a Glance

• The data is a collection of information. 

• The collection, representation and presentation of data helps to organize information. 

• Data can be collected and organized in the form of a table.

• The sum of observations to the total number of observations is known as the Arithmetic Mean.

• The mid-value of the observation is known as the Median.

• The data which occurred many times in a set is known as Mode. 

• Graph, charts help to represent and compare data in pictorial form.

About Chapter 3 Data Handling

3.1 Introduction

Coming to the introduction of the data handling chapter, students learn what data is. Data is nothing but well-structured information. Students will become aware of the different steps of handling specific data like collecting the data, analyzing it properly, evaluating it to get an average, etc., and finally how to represent the data.

The representation of data is taught in different forms like tabular form, pie charts, bar graphs, line graphs, etc. Students may have a brief idea about these in the previous classes. Here, it can be explained in detail. It tells how to organize the data correctly.

3.2 Collecting Data

This section explains to students to learn about the process of collecting data from sources. It also tells how to gather information from data. And also explains how to correlate with the situation to find answers. Let us see some of the situations for instance,

• Literacy rate in Gujarat,

• The temperature of Bangalore,

• The number of girls in a school, etc.

3.3 Organization of Data

Here, students learn to organize properly collected data. Students can learn how to record and organize the data in a particular format. NCERT Solutions for Class 7 Maths Chapter 3 explains clearly all the types of data representing forms. The tabular form is a widely used and basic format to organize the data accurately.

 3.4 Representative Values

Here, students get aware of these values called representative values. These are used to explain the organized data. Students need to keep in mind the word 'average' in the data handling chapter. The term can be used everywhere like average temperature, average time, average distance, the average number of boys, etc. So, students should remember that it is an approximation, not an accurate value. In the PDF, it is explained with examples in NCERT Solutions for Class 7 Maths Chapter 3.

3.5 Arithmetic Mean

From this section, a crucial part of data handling is explained to students. The Arithmetic Mean of data refers to the average and standard representative value of the data. It is a form of representative values. NCERT Solutions for Class 7 Maths Chapter 3 PDF provides you with a formula with solved examples. It is straightforward to find and simple to understand. NCERT Solutions explains the concepts in a simple way for easy understanding of students.

3.5.1 Range

It is a sub-topic of Arithmetic Mean explained to students. Students need to take an average for mean, whereas here they need to subtract minimum from maximum, which gives the range of complete data or observation.

3.6 Mode

In this section, students can learn another crucial topic known as a mode. Similar to the mean, the mode is also another form of symbolic value. Based on the kind of data, students need to use various types of values. NCERT Solutions for Class 7 Maths Chapter 3 explains that mean takes as average. On the other hand, the mode is a recurring value in a set of observations. It means the value which occurs more number of times can be treated as the mode.

3.6.1 Mode of Large Data

Students may have doubts about the mode. If the data is too large, how can it be solved? For this, NCERT Solutions for Class 7 Maths Chapter 3 explains the usage of tally bars helps to find the mode of large data.

3.7 Median

In this section, students can learn one more form of representative values. Here, students should recall the ascending order. Write all the observations in ascending order and find out the exact middle value. It can divide them into two groups accurately. It is called the median, which exists in the middle.

3.8 Use of Bar Graphs with a Different Purpose

The next topic in this chapter is the usage of bar graphs. Here, students learn about the concept of the bar graph and its variations. It is a simple form to represent data in an organized manner. Students need to draw bars with the same length and width for the given frequency to express clearly.

3.8.1 Choosing a Scale

After learning about bar graphs, students can be aware of taking the scale to draw the bar graph. If the data is too large, students can choose a larger scale and vice versa. Based on the values and size, students can take one unit that may equal to 1,10,100 and so on. NCERT Solutions for Class 7 Maths Chapter 3 specifies that the choosing scale may vary but plotting should be perfect.

Examples 7 and 8 are a Reference toTthis Topic.

3.8.2 Drawing Double Bar Graphs

Here, students can enrich more knowledge about bar graphs. If the data is given for two or more for comparison, NCERT Solutions for Class 7 Maths Chapter 3 easily explains the concepts. Students need to draw bar graphs for two but need to show differentiation by shading or colouring.

3.9 Chance and Probability

In this last section, students need to estimate and expect for chance and probability. NCERT Solutions for Class 7 Maths Chapter 3 explains each topic separately to understand the concept clearly.

3.9.1 Chance

Chance is nothing but a prediction. Students should predict and express the result of the data. One should predict the outcome whether it may be correct or wrong. NCERT Solutions in PDF explains this concept clearly with solved examples.

 3.9.2. Probability

The final topic which students can learn in this chapter is Probability. Probability is an estimation of possibilities of occurring chances for data like tossing a coin, rolling dice, etc.

NCERT Solutions for Class 7 Maths Chapter 3 Exercises

NCERT Solutions for Class 7 Maths Chapter 3 Exercises - Key Features

The NCERT Solutions for Class 7 Maths Chapter 3 Data Handling explains to students various topics involved in handling data. Students can attain awareness of collecting, organizing, and representing data in multiple forms. Also, they will have knowledge of various tools to represent data.

• It provides a simple language to understand the topics easily.

• Well-qualified subject experts have provided explanations to every answer.

• NCERT Solutions provide plenty of examples for mock tests and worksheets to practice.

• NCERT Solutions act as an all-rounder for students to hone their learning abilities.

Benefits of Solving NCERT Solutions for Class 7 Maths Chapter 3 

Students can now get NCERT Solutions for Class 7 Maths Chapter 3 Data Handling on Vedantu’s platform. So, let us see how exactly these NCERT Solutions will help the CBSE Class 7 students:

• These solutions are easy to understand. 

• The elaborate description of each concept provided on Vedantu is beneficial. 

• Students can have a clear idea by seeing solved examples and can practice the exercises to make themselves perfect.

• If students have any queries while solving, the well-qualified instructors are available online on the official website to help them.

• NCERT Solutions for Class 7th Maths Chapter 3 gives confidence to students to reach their goals. 

• NCERT Solutions for Class 7 Maths includes a detailed explanation of all the subtopics in data handling, like collecting data, analysing data, calculating averages, representing data using various methods, etc. 

Chapter-wise NCERT Solutions for Class 7 Maths

• Chapter 1 - Integers

• Chapter 2 - Fractions and Decimals

• Chapter 4 - Simple Equations

• Chapter 5 - Lines and Angles

• Chapter 6 - The Triangle and Its Properties

• Chapter 7 - Congruence of Triangles

• Chapter 8 - Comparing Quantities

• Chapter 9 - Rational Numbers

• Chapter 10 - Practical Geometry

• Chapter 11 - Perimeter and Area

• Chapter 12 - Algebraic Expressions

• Chapter 13 - Exponents and Powers

• Chapter 14 - Symmetry

• Chapter 15 - Visualising Solid Shapes

All these were the questions and solutions which were based on the NCERT study of the chapter - Data Handling. NCERT is a vital resource while preparing for the Class 7 CBSE exam, thus the students must give importance to the textbook solved exercises.

Study all the NCERT questions and take note of the list of topics included in this study. You can also use this resource as revision material before your CBSE Class 7 exam. For this, you just have to download the free PDF of NCERT Solutions for Class 7 Maths Chapter 3 Data Handling and use it whenever required.

Conclusion

Vedantu's NCERT Solutions for Class 7 Maths Chapter 3 - Data Handling offer a comprehensive and effective approach to mastering data analysis and interpretation. With a well-structured and easily accessible platform, Vedantu ensures students can confidently tackle diverse data-related problems. These solutions provide step-by-step explanations, enabling a deeper understanding of concepts like bar graphs, pie charts, and mean, median, and mode. By promoting interactive learning and real-time doubt-solving, Vedantu empowers students to excel in their mathematical journey. Overall, Vedantu's NCERT Solutions for Class 7 Maths Chapter 3 prove to be a valuable resource for students, fostering their analytical skills and setting a strong foundation for future mathematical pursuits.