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Mean, median, mode and range
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Learn it Mean: add all values and divide by how many. Median: the middle value in order. Mode: the most common value. Range: greatest − least.
Example: Data: 4, 9, 6, 9, 7. Find the mean, median, mode and range.
- Mean: $(4 + 9 + 6 + 9 + 7) \div 5 = 35 \div 5 = 7$.
- Median: in order 4, 6, 7, 9, 9 → 7.
- Mode: 9 (twice). Range: $9 - 4 = 5$.
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