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Revision Notes

Measures Of Central Tendency

ICSE · Class 11 · Economics

Quick revision notes for Measures Of Central Tendency — ICSE Class 11 Economics. Key concepts, formulas, and definitions for last-minute revision.

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Key Topics to Revise

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1. Meaning, Objectives, and Essentials of an Ideal Average

  • Central tendency is a single figure that represents the whole mass of data.
  • Measures of central tendency are also called statistical averages or measures of location.
  • The three most commonly used measures are mean, median, and mode.
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2. Arithmetic Mean

  • Arithmetic mean is the most popular and most widely used measure of central tendency.
  • It is defined as the sum of values of a group of items divided by the number of items.
  • Arithmetic mean can be simple or weighted.
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3. Weighted Arithmetic Mean and Charlier's Check

  • Weighted arithmetic mean is used when different values have different importance.
  • It is greater than simple arithmetic mean when small values get less weight and large values get more weight.
  • Weighted mean is used in wage-bill calculations, comparison of board or university results, standardized birth and death rates, and index numbers.
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4. Median

  • Median is the middle value of a series when arranged in ascending or descending order.
  • It divides the series into two equal parts.
  • Median is a positional average, so it is not based on all values.

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Key Concepts

Central tendency is a single figureArithmetic mean is defined asWeighted arithmetic mean is used whenMedian is the middle valueMode is the value that occurs

Frequently Asked Questions

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Measures Of Central Tendency covers several key topics that are frequently asked in ICSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Measures Of Central Tendency — ICSE Class 11 Economics?
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