Scatter Diagrams
Overview
A scatter diagram plots pairs of values to reveal whether two quantities are connected. Does more study time go with higher scores? Does temperature affect sales? The pattern of the points answers the question, and a line of best fit lets you make predictions.
In this lesson you will draw and interpret scatter diagrams, describe correlation as positive, negative or zero, and draw and use a line of best fit.
Objectives
- Draw and interpret scatter diagrams.
- Understand what is meant by positive, negative and zero correlation.
- Draw by eye, interpret and use a straight line of best fit.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Scatter 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.
- As study time increases, test scores increase. This is: A. positive correlation B. negative correlation C. zero correlation D. no data Answer: A
- As one quantity increases the other decreases. This is: A. positive correlation B. negative correlation C. zero correlation D. perfect correlation Answer: B
- A line of best fit should: A. join the dots B. pass through the origin C. be balanced through the points D. pass through every point Answer: C
- No clear relationship between two variables is called: A. positive correlation B. negative correlation C. zero correlation D. strong correlation Answer: C
- A line of best fit is mainly used to: A. prove cause B. estimate values C. list the data D. find the mean Answer: B
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