Creating Pie Charts

Name:

Date:

📊 Part 1: Understanding Pie Charts

1. What type of data is best represented by a pie chart?

Numerical data showing change over time

Categorical data showing parts of a whole

Data comparing two different groups

Continuous data with many values

2. A pie chart represents data as sectors of a circle. What is the total angle of all sectors combined?

180°

270°

360°

400°

3. Which of the following are essential components of a good pie chart? (Select all that apply)

Clear labels for each sector

A legend or key

Accurate proportional angles

3D effects to make it look modern

🔢 Part 2: Calculating Angles and Proportions

4. A survey of 120 Year 11 students asked about their favourite sport. The results were:
• Rugby: 48 students
• Netball: 36 students
• Football: 24 students
• Basketball: 12 students

Calculate the percentage for Rugby: _________%

5. Using the same data from Question 4, calculate the angle for the Rugby sector in the pie chart.

Formula: Angle = (Number in category ÷ Total) × 360°

Rugby angle = _______°

6. Complete the table for all sports from the survey:

Sport | Frequency | Percentage | Angle

Rugby | 48 | ____% | ____°

Netball | 36 | ____% | ____°

Football | 24 | ____% | ____°

Basketball | 12 | ____% | ____°

TOTAL | 120 | 100% | 360°

📈 Part 3: Creating and Interpreting Pie Charts

7. Using the data from Questions 4-6, draw a pie chart in the space below. Remember to:

• Use a protractor to measure angles accurately
• Label each sector clearly
• Include a title and legend
• Use different colours or patterns for each sector

8. Write a brief interpretation of your pie chart. What does it tell us about students' favourite sports?

9. A classmate creates a pie chart but forgets to check their calculations. Their angles add up to 340°. Explain what went wrong and how they could fix it.

10. Why might a pie chart be more effective than a bar graph for showing this sports preference data to parents at a school meeting?