GCSE Secondary Maths Age 13-17 - Probability & Statistics: Simple Charts and Graphs - Explained

The video tutorial explains how to interpret a composite bar chart showing sales data for computers, laptops, and tablets over three years. It covers calculating sales for specific items, identifying the greatest sales increase, and analyzing profit assumptions based on sales data. The tutorial emphasizes careful reading of the chart and understanding the axes and keys.

What does the vertical axis of the composite bar chart represent?

How many desktop computers were sold in 2015 according to the bar chart?

Calculate the total number of laptops sold over the three years.

Which item had the greatest increase in sales over the three years?

Explain why the tablets had the greatest increase in sales.

Discuss the importance of understanding the information on both axes of the bar chart.

What factors should be considered to determine if more profit was made from tablets than desktop computers?