Green Bridge Learning Resource For Cumulative Frequency Diagrams

Overview

A cumulative frequency diagram adds up frequencies as you go, building a smooth rising curve that reveals the median and the spread of a data set at a glance. It is the key to reading quartiles and percentiles from grouped data.

In this lesson (Extended tier) you will draw and interpret cumulative frequency tables and diagrams, and estimate the median, quartiles, percentiles and interquartile range from the curve.

Lesson Evaluation

Congratulations on completing the lesson on Cumulative Frequency 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.

Cumulative frequency points are plotted at the: A. middle of each group B. upper boundary of each group C. lower boundary D. frequency value Answer: B
For 40 values, the median is read across from a cumulative frequency of: A. 10 B. 20 C. 30 D. 40 Answer: B
The lower quartile of n values is read from a cumulative frequency of: A. n/4 B. n/2 C. 3n/4 D. n Answer: A
If LQ = 11 and UQ = 17, the interquartile range is: A. 6 B. 11 C. 17 D. 28 Answer: A
A cumulative frequency curve is typically: A. a straight line B. a rising S-shape C. a parabola D. a falling line Answer: B