1. Introduction to Data Handling

Data handling is the process of collecting, organizing, representing, and interpreting information (data) to draw conclusions or make decisions. In Class 6, students learn how to manage data using tables, charts, and graphs.

2. Collection and Organization of Data

• Data Collection: Gathering information through surveys, experiments, or observations.
• Raw Data: Data as collected, before any processing.
• Organization: Arranging data in a systematic way, often using tables or lists.

3. Presentation of Data

• Frequency Distribution: Shows how many times each value occurs.
• Tally Marks: Used to count and record frequencies quickly.
• Tables: Data is arranged in rows and columns for clarity.

4. Pictographs

A pictograph uses pictures or symbols to represent data. Each symbol stands for a certain number of items.

5. Bar Graphs

A bar graph uses bars of equal width to represent data. The length of each bar shows the value.

• Bars can be drawn vertically or horizontally.
• Bar graphs make it easy to compare different groups.

6. Interpretation of Data

• Read tables, pictographs, and bar graphs to answer questions.
• Compare quantities, find the highest/lowest values, and draw conclusions.

7. Word Problems

1. In a survey, 10 students like cricket, 7 like football, and 5 like badminton. Represent this data using a bar graph.
2. The following pictograph shows the number of cars sold in a week. If each 🚗 represents 5 cars, how many cars were sold on Wednesday?
   Monday: 🚗🚗
   Tuesday: 🚗🚗🚗
   Wednesday: 🚗🚗🚗🚗
   Answer: 4 × 5 = 20 cars

8. Activities

• Collect data from your classmates about their favorite color and represent it using a pictograph.
• Draw a bar graph to show the number of pets owned by students in your class.

9. Summary

• Data handling helps us organize and understand information.
• We can represent data using tables, pictographs, and bar graphs.
• Interpreting data helps us make decisions and solve problems.