Mean, Median & Mode
Mean is the average, median is the middle, mode is the most common.
The rules
- Mean = sum / count.
- Median: order the numbers first. For an even count, average the middle two.
- Mode can have more than one value, or none.
- Adding a very large value raises the mean more than the median.
Watch out: Not sorting before finding the median.
Worked example
What is the median of 21, 16, 30, 12, 25?
- Sort: 12, 16, 21, 25, 30.
- The middle value is 21.
Answer: 21
Try it yourself
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