Lesson: Descending Cumulative Frequency Graphs Mathematics

In this lesson, we will learn how to draw a descending cumulative frequency diagram and use it to make estimations about the data.

Lesson Plan

Students will be able to

complete a descending cumulative frequency table from a grouped frequency table,
draw a descending cumulative frequency graph given a grouped frequency table,
make estimations about data using a descending cumulative frequency graph.

Q1:

Consider the given descending cumulative frequency graph, which represents the age, in years, of people enrolled in a certain online course.

What is the total number of people in the course?

Q2:

Consider the descending cumulative frequency graph shown, which represents the weights of 200 people.

How many people weigh more than 60 kg?

Q3:

Consider the given descending cumulative frequency graph, which describes the height in centimeters of a sample of 100 basketball players.

Which of the following is the estimate of the height that 50 percent of the players are taller than?