GCSE Secondary Maths Age 13-17 - Probability & Statistics: Stem and Leaf Diagram - Explained

The video tutorial explains how to create and order a stem and leaf diagram using a set of data. It emphasizes the importance of identifying the lowest and highest data points, organizing the data correctly, and including a key for full marks. The tutorial is structured around a three-mark question, highlighting the steps needed to achieve each mark.

What is the first step in creating a stem and leaf diagram?

• List all data points in ascending order

• Draw a histogram

• Calculate the average of the data

• Identify the lowest and highest data points

Which of the following is NOT a stem in the given data set?

• 5

• 7

• 3

• 2

What should you do after recording all data in the stem and leaf diagram?

• Order the leaves for each stem

• Add more data points

• Change the stems

• Erase the diagram

How many marks are awarded for an unordered stem and leaf diagram?

• Three marks

• Two marks

• No marks

• One mark

Why is the key important in a stem and leaf diagram?

• It is optional and not important

• It is necessary for full marks

• It helps in calculating the mean

• It is used to draw the diagram