Class 8 Maths – Chapter 5
Data Handling

NCERT Notes | Simple Explanation | Exam Ready

 What is Data?

Data means information collected in numbers, words, or facts. This chapter teaches us how to organise, represent, and understand data.

📊 Types of Data

• Raw Data
• Grouped Data
• Ungrouped Data

➗ Mean (Average)

Mean is found by dividing the sum of observations by the number of observations.

Mean = Sum of observations ÷ Number of observations

📍 Median

Median is the middle value when data is arranged in order.

🔁 Mode

Mode is the value that occurs most frequently.

📈 Graphical Representation

• Bar Graph
• Double Bar Graph
• Pie Chart

⚠️ Common Mistakes

• Not arranging data properly
• Wrong division in mean
• Missing scale in graphs

Exam Tip

Always write the formula before solving. Neat tables and graphs fetch full marks.

📘 Prepared by Shaktimatha Learning | Class 8 Maths