GCSE Secondary Maths Age 13-17 - Probability & Statistics: Cumulative Frequency Graph - Explained

The video tutorial explains how to interpret a cumulative frequency graph to estimate the number of students with heights greater than 160 cm. It involves checking the axes, drawing lines on the graph, and calculating the difference from the total number of students. The tutorial also discusses the marks awarded for the question and its relevance to GCSE exams.

What does the horizontal axis represent in the cumulative frequency graph discussed?

• The age of students

• The cumulative frequency

• The height in centimeters

• The number of students

How do you determine the number of students with a height greater than 160 cm using the graph?

• By counting the number of lines on the graph

• By measuring the height of the graph

• By drawing a line from 160 cm on the horizontal axis to the graph and then across to the vertical axis

• By calculating the area under the graph

What does the value 48 represent in the context of the graph?

• The average height of students

• The number of students shorter than 160 cm

• The number of students taller than 160 cm

• The total number of students

How many students have a height greater than 160 cm?

• 12

• 24

• 48

• 60

Why is it important to understand the term 'greater than' in this question?

• It is necessary for drawing the graph

• It is used to label the axes

• It ensures the correct calculation of students taller than 160 cm

• It helps in identifying the correct graph