Chapter 12 of 12
Revision Notes
Statistics — Revision Notes
Gujarat Board · Class 9 · Mathematics
Statistics revision notes for Gujarat Board Class 9 Mathematics: 3 topics in quick points. Includes Bar Graphs, Histograms and Frequency Polygons.
45 questions20 flashcards4 concepts
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Key Topics to Revise
1
Bar Graphs
- Bar graphs are pictorial representations of data using rectangular bars
- Bars have uniform width with equal spacing between them
- Variable is shown on x-axis, values on y-axis
2
Histograms
- Used for continuous class intervals (grouped frequency distribution)
- Rectangular bars touch each other (no gaps)
- Width of bars represents class interval size
3
Frequency Polygons
- Created by joining mid-points of top sides of histogram rectangles
- Can be drawn with or without histogram
- Requires class marks (mid-points of class intervals)
Get complete notes with diagrams and examples
Full NotesKey Concepts
Bar graphs are pictorial representations whereHistograms are graphical representations of groupedWhen class intervals have different widthsFrequency polygons are formed by joining
Frequently Asked Questions
What are the important topics in Statistics for Gujarat Board Class 9 Mathematics?
Key topics in Statistics include Bar Graphs, Histograms, Frequency Polygons. Study these first, then practise questions on each for Class 9 exams.
How should I revise Statistics for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Statistics. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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