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Revision Notes

Measures Of Dispersion

Telangana Open School (TOSS) · Class 12 · Mathematics

Quick revision notes for Measures Of Dispersion — Telangana Open School (TOSS) Class 12 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

50 questions25 flashcards4 concepts

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Key Topics to Revise

1

1. Range

  • Range is the simplest measure of dispersion.
  • It is the difference between the largest and smallest values in a dataset.
  • It gives a rough idea about the spread of data.
2

2. Mean Deviation

  • Mean Deviation measures the average of absolute deviations from the mean or median.
  • It considers all data points, so it is better than range.
  • It is less affected by extreme values when calculated from median.
3

3. Variance and Standard Deviation

  • Variance is the average of squared deviations from the mean.
  • Standard Deviation is the positive square root of variance.
  • These are the most widely used measures of dispersion.
4

4. Step Deviation Method

  • Used to simplify calculations in grouped data.
  • Involves coding the data using \(u_i = \frac{x_i - a}{h}\).
  • Reduces large numbers and simplifies arithmetic.

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Full Notes

Key Concepts

The range is the simplest measureMean deviation is the averageVariance is the average ofStandard deviation is the positive square

Frequently Asked Questions

What are the important topics in Measures Of Dispersion for Telangana Open School (TOSS) Class 12 Mathematics?
Measures Of Dispersion covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 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 Dispersion — Telangana Open School (TOSS) Class 12 Mathematics?
Understand the core concepts first, then work through the 50 practice questions available for this chapter. Revise formulas and 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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