Skip to main content
Super TutorResources
Chapter 22 of 25
Revision Notes

Measures Of Dispersion — Revision Notes

ICSE · Class 11 · Economics

Measures Of Dispersion revision notes for ICSE Class 11 Economics: 4 topics in quick points. Part of the ICSE Class 11 Economics syllabus.

52 questions40 flashcards2 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Measures Of Dispersion? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

Free trial, no card needed.

Key Topics to Revise

1

Meaning and Need of Dispersion

  • Dispersion shows the scatteredness or variation of values in a series.
  • It is used in two senses: variation among items, and average difference from the mean.
  • A single average does not always represent all observations well.
2

Types of Measures of Dispersion

  • Absolute measures are expressed in the same unit as the data, such as rupees, kilograms, or years.
  • Relative measures are coefficients or percentages and do not depend on the unit of measurement.
  • Absolute measures include range, quartile deviation, mean deviation, and standard deviation.
3

Range and Coefficient of Range

  • Range is the simplest measure of dispersion.
  • It is the difference between the largest and smallest value of a series.
  • Range is not based on all values.
4

Quartile Deviation, Inter-Quartile Range, and Percentile Range

  • Inter-quartile range shows the spread of the middle 50% of data.
  • Inter-quartile range is Q3 - Q1.
  • Quartile deviation is half of the inter-quartile range.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Dispersion is the scatteredness or spreadAbsolute measures are expressed inRange is the difference betweenQuartile deviationMean deviation is the arithmetic average

Frequently Asked Questions

What are the important topics in Measures Of Dispersion for ICSE Class 11 Economics?
Key topics in Measures Of Dispersion include Meaning and Need of Dispersion, Types of Measures of Dispersion, Range and Coefficient of Range, Quartile Deviation, Inter-Quartile Range, and Percentile Range. Study these first, then practise questions on each for Class 11 exams.
How should I revise Measures Of Dispersion for Class 11 exams?
Learn the core ideas first, then work through the 52 practice questions on Measures Of Dispersion. 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.

More resources for Measures Of Dispersion

All ICSE Class 11 Economics Revision Notes

For serious students

Get the full Measures Of Dispersion chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 11 Economics. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free