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Statistics — Revision Notes

CBSE · Class 11 · Mathematics

Statistics revision notes for CBSE Class 11 Mathematics: 4 topics in quick points. Includes Basics of Statistics and Central, Range and Mean Deviation.

161 questions60 flashcards8 formulas & key relations5 concepts

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Key Topics to Revise

1

1. Basics of Statistics and Central Tendency

  • Statistics is used to study data collected for a specific purpose.
  • Mean, median, and mode are the three measures of central tendency.
  • A central value gives only a rough idea of the data. It does not show the spread of values.
2

2. Range

  • Range is the simplest measure of dispersion.
  • Range uses only the maximum and minimum values of the data.
  • It gives a rough idea of variability.
3

3. Mean Deviation

  • Mean deviation is the mean of absolute deviations from a chosen central value.
  • It can be found about mean or about median.
  • Absolute values are used so that positive and negative deviations do not cancel.
4

4. Mean Deviation for Grouped Data

  • Grouped data may be discrete frequency distribution or continuous frequency distribution.
  • Discrete frequency distribution has distinct values with frequencies.
  • Continuous frequency distribution has class intervals without gaps with frequencies.

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Full Notes

Key Concepts

Statistics deals with data collectedMeanRange of a series = MaximumMean deviation is the meanMean deviation about mean and median

Frequently Asked Questions

What are the important topics in Statistics for CBSE Class 11 Mathematics?
Key topics in Statistics include Basics of Statistics and Central Tendency, Range, Mean Deviation, Mean Deviation for Grouped Data. Study these first, then practise questions on each for Class 11 exams.
How should I revise Statistics for Class 11 exams?
Learn the core ideas first, then work through the 161 practice questions on Statistics. 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 CBSE Class 11 Mathematics Revision Notes

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