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Statistics and Probability

Tamil Nadu Board · Class 10 · Mathematics

Quick revision notes for Statistics and Probability — Tamil Nadu Board Class 10 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

44 questions24 flashcards5 concepts

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Key Topics to Revise

1

Measures of Dispersion – Overview and Range

  • Dispersion tells us how spread out the data values are from the central value (mean).
  • Two datasets can have the same mean but very different spreads – dispersion helps identify this difference.
  • Example: Batsman A and Batsman B both scored a mean of 40 runs in 10 matches, but A's scores were scattered (4 to 93) while B's scores were clustered (26 to 50).
2

Standard Deviation and Variance

  • Standard Deviation (σ) is the positive square root of Variance (σ²).
  • Variance is the mean of the squares of deviations from the arithmetic mean.
  • Standard deviation gives a clearer picture of how far values are from the mean.
3

Coefficient of Variation

  • Coefficient of Variation (C.V.) is a relative measure of dispersion – it has NO units.
  • C.V. is used to compare the consistency of two or more datasets that may have different units or different scales.
  • C.V. = (σ/x̄) × 100 percent
4

Probability – Fundamentals

  • Probability measures the likelihood of occurrence of an event in a random experiment.
  • A Random Experiment has: (i) all possible outcomes are known, (ii) exact outcome cannot be predicted in advance.
  • Sample Space (S) is the set of ALL possible outcomes of a random experiment.

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Full Notes

Key Concepts

These are single values that representRange is the simplest measureVariance (σ²) is the meanCV = (σ/x̄) × 100%A random experiment is a process

Frequently Asked Questions

What are the important topics in Statistics and Probability for Tamil Nadu Board Class 10 Mathematics?
Key topics in Statistics and Probability include Statistics and Probability – Complete Chapter Overview, Mind map showing the main branches of Statistics and Probability with their key components and applications, Mind map showing the three main measures of central tendency and their characteristics. These are the concepts Tamil Nadu Board Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Statistics and Probability — Tamil Nadu Board Class 10 Mathematics?
Understand the core concepts first, then work through the 44 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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All 8 chapters — Tamil Nadu Board Class 10 Mathematics Revision Notes

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