Statistics class 11 Notes Mathematics

CBSE Mathematics Chapter 15 Statistics class 11 Notes Mathematics in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Statistics class 11 Notes Mathematics latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 11 Mathematics notes on Chapter 15 Statistics class 11 Notes Mathematics are also available for download in CBSE Guide website.

CBSE Guide Statistics class 11 Notes

CBSE guide notes are the comprehensive notes which covers the latest syllabus of CBSE and NCERT. It includes all the topics given in NCERT class 11 Mathematics text book. Users can download CBSE guide quick revision notes from myCBSEguide mobile app and my CBSE guide website.

Statistics class 11 Notes Mathematics

Download CBSE class 11th revision notes for Chapter 15 Statistics class 11 Notes Mathematics in PDF format for free. Download revision notes for Statistics class 11 Notes Mathematics and score high in exams. These are the Statistics class 11 Notes Mathematics prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.

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CBSE Class 11 Mathematics
Revision Notes
Statistics class 11 Notes Mathematics

  1. Mean: 
  2. Median: If the number of observations  is odd, then median is observation and if the number of observations  is even, then median is the mean of  and  observations.
  3. Measures of Dispersion, Range  and Mean Deviation
  4. Variance and Standard Deviation
  5. Analysis of Frequency Distributions
  • Measures of dispersion Range, Quartile deviation, mean deviation, variance, standard deviation are measures of dispersion.
  • Range = Maximum Value – Minimum Value
  • Mean deviation for ungrouped data
  • Mean Deviation from Median for ungrouped data
  • Mean deviation for grouped data
  • Mean Deviation from Median for grouped data
     where N  =
  • Variance and standard deviation for ungrouped data
    Standard deviation: 
  • Variance and standard deviation of a discrete frequency distribution
    Standard deviation: 
  • Variance and standard deviation of a continuous frequency distribution

(i)    If  = 1, 2, 3, ……….,  is a continuous frequency distribution of a variate X,


(ii)   If  be the  given observations with respective frequencies

, then    , where N =

(iii)  If  where A is assumed mean, then

(iv)  If  where  is the common difference of values of  then

  • Analysis of frequency distribution with equal means but different variances: If the S.D. of group A < the S.D. of group B, then group A is considered more consistent or uniform.
  • Ananlysis of frequency distribution with unequal means: In this case we compare the coefficient of variation [Coefficient of variation (C.V. =  The series having greater coefficient of variation is said to be more variable than the other.
  • Variance of the combined two series:
    where  and  are the sizes of two groups,  and  are the S.D. of two groups, ,  and

Statistics class 11 Notes

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CBSE Class-11 Revision Notes and Key Points

Statistics class 11 Notes Mathematics. CBSE quick revision note for class-11 Mathematics, Physics, Chemistry, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

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