Ex. 3.3 - Qn-3 - Chapter 3 - Data Handling - Class 7 Maths|NCERT|CBSE|English Medium|NewSyllabus

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Chapter 3 - Data Handling - Playlist
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Exercise 3.3 - Question - 3 - Chapter 3 - Data Handling - Class 7 Maths |NCERT|CBSE|English Medium|NewSyllabus

Any raw information which we collect to know about it and to compare certain things is called Data. This information is in the form of facts and figures and is collected for some specific purpose.

Example
Number of students in the class
The temperature in a state on daily basis.

Data Handling
We need to collect, organize and represent that data to draw inferences from it. This is called Data Handling.

Collecting Data
Collection of data depends upon the further requirement of the data. Before collecting any data we must know that what will be the use of data.

If we have to compare the marks of the toppers in different classes then we need the data of all the classes not only one class having any topper.

Organization of Data
Before using any data, first, we need to organize it in a systematic manner so that it could be understood easily. Generally, data is organized in tabular form as it is easy to read and understand.

There are three types of central tendency of data-

1. Arithmetic Mean
The mean is the average of the number of observations. To calculate mean we have to divide the sum of the values of the observations by the total number of observations.

2. Mode
For a different type of requirements different central tendencies are used.

Mode tells us the number of observation which occurs more frequently. The observation which occurs most of the time is called the Mode of that group.

3. Median
The middle value of the given number of the observations which divides it into exactly two parts is called Median.

To find the median, we have to arrange the data in ascending or descending order then find the middle value of the given number of observations that is the median of that group.

Throughout the video, we will explain the concepts using clear explanations, visual aids, and step-by-step examples. We will ensure that you have a solid foundation in this chapter by the end of this video, enabling you to tackle more complex mathematical concepts with confidence.

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