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

The video tutorial explains how to create a stem and leaf diagram using the times taken by 20 children to walk to school. It covers identifying the data range, creating an unordered stem and leaf diagram, ordering the data, and writing the key. The tutorial emphasizes the importance of organizing data for finding medians and modes, and it highlights the marks awarded for each step in the process.

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

• Identify the median of the data

• Find the lowest and highest data points

• List all data points in descending order

• Calculate the average of the data

In the unordered stem and leaf diagram, what does the 'stem' represent?

• The median of the data

• The units digit of the data

• The average of the data

• The tens digit of the data

What is the purpose of ordering the stem and leaf diagram?

• To make it visually appealing

• To reduce the number of data points

• To eliminate outliers

• To easily find medians and modes

Why is it important to write a key for the stem and leaf diagram?

• To provide a summary of the data

• To clarify the representation of numbers

• To explain the data source

• To list the data points in order

How many marks are allocated for the ordered stem and leaf diagram?

• Four marks

• One mark

• Two marks

• Three marks