Statistical Charts And Diagrams
Overview
A good chart turns a column of numbers into a picture you can understand at a glance. Bar charts compare quantities, pie charts show how a whole is shared, and stem-and-leaf diagrams keep the data while showing its shape. Choosing and reading the right chart is a core data skill.
In this lesson you will draw and interpret bar charts, pie charts, pictograms, stem-and-leaf diagrams and simple frequency distributions.
Objectives
- Draw and interpret: (a) bar charts (b) pie charts (c) pictograms (d) stem-and-leaf diagrams (e) simple frequency distributions.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Statistical Charts And Diagrams. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Of 30 students, 12 travel by bus. The pie chart angle for bus is: A. 12° B. 120° C. 144° D. 360° Answer: C
- The angles of all the slices in a pie chart add up to: A. 100° B. 180° C. 270° D. 360° Answer: D
- Which chart is best for comparing the frequencies of separate categories? A. pie chart B. bar chart C. scatter diagram D. stem-and-leaf Answer: B
- In a stem-and-leaf diagram, 2 | 5 means (with a suitable key): A. 2.5 B. 7 C. 25 D. 52 Answer: C
- A pie chart is best used to show: A. correlation B. shares of a whole C. a trend over time D. exact raw data Answer: B
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