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Measures Of Dispersion — Chapter Summary

ICSE · Class 11 · Economics

Summary of Measures Of Dispersion for ICSE Class 11 Economics. Key concepts: Dispersion is, Absolute measures are and Range is the difference.

52 questions40 flashcards2 formulas & key relations5 concepts

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Overview

Dispersion shows how far the items in a series are spread out from one another and from a central value. Averages alone can hide important differences, because two series may have the same mean but very different spread. Dispersion is therefore used to judge the reliability of an average, compare va

Key Concepts

Dispersion is the scatteredness or spread

Dispersion is the scatteredness or spread of values in a series. It shows how much individual items vary from each other and from the central value. I

Absolute measures are expressed in

Absolute measures are expressed in the same unit as the data, such as rupees or kilograms. Relative measures are coefficients or percentages and do no

Range is the difference between

Range is the difference between the largest and smallest value of a series. Its formula is R = L - S. It is simple and quick, but it depends only on t

Quartile deviation

Quartile deviation, also called semi-inter-quartile range, is (Q3 - Q1)/2. It measures the spread of the middle 50% of the data and ignores the first

Mean deviation is the arithmetic average

Mean deviation is the arithmetic average of absolute deviations from mean or median. For an individual series, M.D. = Σ|D|/N. Mode is generally not us

Learning Objectives

  • To understand the meaning and need of dispersion
  • To distinguish between absolute and relative measures of dispersion
  • To learn the methods of measuring dispersion, including range, quartile deviation, mean deviation, standard deviation, and Lorenz curve
  • To compare the merits and demerits of different measures
  • To use dispersion for comparing variability, consistency, and inequality

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.

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All ICSE Class 11 Economics Chapter Summary

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