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Revision Notes

Statistics

Gujarat Board · Class 9 · Mathematics

Quick revision notes for Statistics — Gujarat Board Class 9 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

45 questions20 flashcards4 concepts

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)

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Full Notes

Key Concepts

Bar graphs are pictorial representations whereHistograms are graphical representations of groupedWhen class intervals have different widthsFrequency polygons are formed by joining

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Frequently Asked Questions

What are the important topics in Statistics for Gujarat Board Class 9 Mathematics?

Statistics covers several key topics that are frequently asked in Gujarat Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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Surface Areas and Volumes

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All 12 chapters — Gujarat Board Class 9 Mathematics Revision Notes