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This topic finds the mean, median, mode and range from a list of raw data and chooses the most appropriate average to represent a set of values. It's a core topic in GCSE and iGCSE Maths with Edexcel and the other major boards. This free interactive course teaches the method with worked examples and gives instant-feedback practice questions to lock it in.
How you do it
The mean is the total divided by how many there are. The median is the middle value once the list is in order — order it first, always. The mode is the most common value. The range is the largest minus the smallest.
Before you start
This builds directly on the four operations. Assessed at Foundation and Higher tier. It underpins averages from tables and comparing data. The topic sits within Data & Statistics.
What you learn
Before you can draw a chart or find an average, you need to know what type of data you have — it decides which methods and diagrams are even allowed. Qualitative (categorical) data describes a quality in words — eye colour, favourite sport, brand of car. Continuous data can take any value in a range — height, mass, time. Primary data is collected by you, for your own purpose — a survey you carry out, measurements you take. The course works through qualitative and quantitative, discrete and continuous and primary and secondary data. Every section has instant-feedback practice questions matched to Edexcel iGCSE 4MA1 and the other major GCSE boards, and the course finishes with full exam-style questions you mark yourself.
Related Topics
Averages — Raw Data is a Data and Statistics topic in the GCSE syllabus, covered here at Foundation tier. You work through 3 concepts and 2 worked examples, testing yourself at 3 points. Students often pair it with Charts & Diagrams, Comparing Distributions, Cumulative Frequency, Histograms and Types of Data. The Data and Statistics revision engine gives you as many extra questions as you want, tracked on your skill tree.
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