## Did you know?

We also have Bitesize study guides covering many subjects at National 4 and National 5 on our Knowledge & Learning BETA website.

Home > Maths I > Relationships > Graphs, charts and tables

Maths I

Graphs, charts and tables

Next

# Stem and leaf diagrams

A maths test is marked out of 50. The marks for the class are shown below:

• 7, 36, 41, 39, 27, 21
• 24, 17, 24, 31, 17, 13
• 31, 19, 8, 10, 14, 45
• 49, 50, 45, 32, 25, 17
• 46, 36, 23, 18, 12, 6

This data can be more easily interpreted if we represent it in a stem and leaf diagram.

This stem and leaf diagram shows the data above:

The stem and leaf diagram is formed by splitting the numbers into two parts - in this case, tens and units.

The tens form the ‘stem’ and the units form the ‘leaves’.

This information is given to us in the key.

It is usual for the numbers to be ordered. So, for example, the row

shows the numbers 21, 23, 24, 24, 25 and 27, in order.

Question
From the stem-and-leaf diagram, how many children scored more than 40?

6 people had a score of more than 40

To find this, look down the 'stem' to the row labelled '4', and don't forget to include the child who scored 50!

Next

BBC iD