| --- |
| source: ncert |
| topic: statistics |
| class_level: class_6 |
| chapter: ch9 |
| difficulty: beginner |
| --- |
| |
| Class 6 | Ch9: Data Handling |
| Mean = Sum/Count. Median = middle value when arranged in order. |
| Odd count: middle term. Even count: average of two middle terms. |
| Mode = most frequent value. Range = Max - Min. |
| Bar graph: equal width bars, height=frequency. Tally: groups of 5. |
| Probability: P(event)=favourable/total. Always between 0 and 1. |
| Example: 12,15,11,18,15,13,20,15,10. Mean=129/9=14.33. Arranged→Median=15. Mode=15. |
| P(even on die)=3/6=1/2. |
| Must arrange data BEFORE finding median. Mode is most FREQUENT not largest. |
