Data handling
Lesson 3 of 10
Mean, median, mode and range
Objective. Calculate and choose between the three averages.
The key idea
Mean shares the total equally, median is the middle value in order, mode is the most common, and range measures spread rather than average.
Worked example
Find the mean, median, mode and range of 3, 7, 7, 9, 14.
- 1Total is 40 and there are 5 values, so mean = 8.
- 2The middle value in order is 7.
- 37 appears twice, so mode = 7.
- 4Range = 14 − 3 = 11.
Answer: Mean 8, median 7, mode 7, range 11
Practice
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