- A10.5
- B8.5
- C9.5
- D19
Step-by-Step Solution
Sort: 7, 8, 9, 10, 11, 13. Even count (6). Middle two are 9 and 10. Median = (9+10)/2 = 9.5.
Answer: C) 9.5
The ages (in years) of 6 children are 8, 11, 7, 10, 9, 13. Find the median age.
Class 7Data HandlingData Handling
Key idea: Median — the middle value
Step 1: arrange the data in **ascending order**. Step 2: find the middle.
- **Odd count**: the middle value is the median. Marks 3, 5, 7, 9, 11 → median = 7.
- **Even count**: average the two middle values. Marks 3, 5, 7, 9 → middle two are 5 and 7 → median = (5+7)/2 = 6.
Median ignores extreme values; it tells you the 'typical middle' regardless of outliers.
- **Odd count**: the middle value is the median. Marks 3, 5, 7, 9, 11 → median = 7.
- **Even count**: average the two middle values. Marks 3, 5, 7, 9 → middle two are 5 and 7 → median = (5+7)/2 = 6.
Median ignores extreme values; it tells you the 'typical middle' regardless of outliers.
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