Скачать или смотреть Data Handling & Presentation | Chapter 4 | Class 6 | Ganita Prakash | Page 74 to 78 | Explanation

🎓 Class 6 Mathematics | Ganita Prakash | Chapter 4: Data Handling & Presentation
📖 Pages: 74 to 78
Welcome to this detailed explanation of Data Handling & Presentation from Chapter 4 of the Class 6 Ganita Prakash textbook (pages 74–78). In this lesson, we cover:
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📊 What You Will Learn
1. What is Data?
o Definition: Data is a collection of facts, observations, or measurements about things.
o Examples of data in everyday life (heights, favourite games, counts).
2. Collecting & Organising Data
o How to collect data (surveys, observations).
o Why raw data is hard to interpret and needs organization.
3. Tally Marks & Frequency Tables
o How to use tally marks to count repeated observations (groups of five).
o Constructing a table from tally marks to find the frequency (number of times each item occurs).
4. Worked Example (Pages 76–78)
o Sweets Preference Example: Shri Nilesh asks students about their favourite sweets. We make a table with tally marks and frequencies to find how many students choose each sweet.
o Shoe Size Data: Given a list of students’ shoe sizes, we sort them in ascending order and answer questions:
• What is the smallest size?
• What is the largest size?
• How many wear size 5?
• How many wear sizes greater than 4?
5. Why Sorting Helps
o Arranging data in ascending (or descending) order helps in identifying the minimum, maximum, and counting how many entries lie above or below a threshold.
✅ Key Takeaways
• Data must be collected and then organized so that it becomes meaningful.
• Tally marks and frequency tables make it easier to count and summarize.
• Sorting data helps in quickly spotting extremes (smallest, largest) and making comparisons.
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✏️ Comment below if you want explanations of the exercises on pages 78–85, or pictographs and bar graphs from later in the chapter.

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