Mean, median, mode and range
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The teaching part (1 min) is free to watch. A free account opens the whole lecture: 6 practice questions, 2 real past-paper questions with the answers explained, the mistakes that lose marks, the full-marks tip, a one-card summary and a quick quiz.
What this lecture covers
- One number for the whole group
- Mean, median, mode, range
Read the transcript of the teaching part
Last time
Before we start: last time, in Frequency tables, charts and scatter diagrams, you learned these points. Here they are again on one card. Keep them in mind, because today builds on them.
One number for the whole group
How tall is a typical student in your class? An average is one number that stands for the whole group. But there are three different averages, and they can give very different answers. Mean, median and mode each answer a slightly different question. The range then tells you how spread out the data is.
Mean, median, mode, range
The mean is the total of all values divided by how many there are. The median is the middle value when the data is in order. The mode is the most common value. The range is the largest value minus the smallest. For an even number of values, the median is halfway between the two middle ones.
How often it comes up
How often Cambridge has asked each part, counted by ExamYard from every past paper in its question bank: Mean from a frequency table · Median, mode and range.
The whole chapter: Averages and Spread.
Chapter 31: Averages
- Mean, median, mode and range 6 min
Also for IGCSE Maths 0580
Which topics come up most in IGCSE Maths 0580 past papers, counted from every paper since 2004.