Statistics Formulas for Class 11 Maths Chapter 15
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- Mean Deviation for the ungrouped data:
- (i) \(M.D.(\bar x)=\frac{\sum \left | x_i-\bar x \right |}{n}\)
- (ii) \(M.D.(M)=\frac{\sum \left | x_i-M \right |}{n}\)
- Mean Deviation for the grouped data:
- (i) \(M.D.(\bar x)=\frac{\sum f_i|x_i-\bar x|}{N}\)
- (ii) \(M.D.(M)=\frac{\sum f_i|x_i-M|}{N}\)
- Variance and Standard Deviation for the ungrouped data:
- (i) \(\sigma ^2=\frac{1}{N}\sum (x_i-\bar x)^2\)
- (ii) \(\sigma=\sqrt{\frac{1}{N}\sum (x_i-\bar x)^2}\)
- Variance and Standard Deviation of a frequency distribution (discrete):
- (i) \(\sigma ^2=\frac{1}{N}\sum f_i(x_i-\bar x)^2\)
- (ii) \(\sigma=\sqrt{\frac{1}{N}\sum f_i(x_i-\bar x)^2}\)
- Variance and Standard Deviation of a frequency distribution (continuous):
- (i) \(\sigma ^2=\frac{1}{N}\sum f_i(x_i-\bar x)^2\)
- (ii) \(\sigma=\frac{1}{N}\sqrt{N\sum f_ix_i^2-(\sum f_ix_i)^2}\)
- Coefficient of variation (C.V.) = \(\frac{\sigma}{\bar x}\times 100\) ; where \(\bar x\neq 0\)
Summary Statistics Formulas
We have listed top important formulas for Statistics for class 11 Chapter 15 which helps support to solve questions related to chapter Statistics. I would like to say that after remembering the Statistics formulas you can start the questions and answers the solution of the Statistics chapter. If you faced any problem to find a solution of Statistics questions, please let me know through commenting or mail.
NCERT Class 11 Maths Formulas By chapters
- Chapter 1 Sets
- Chapter 2 Relations and Functions
- Chapter 3 Trigonometric Functions
- Chapter 4 Principle of Mathematical Induction
- Chapter 5 Complex Numbers and Quadratic Equations
- Chapter 7 Permutations and Combinations
- Chapter 8 Binomial Theorem
- Chapter 9 Sequences and Series
- Chapter 10 Straight lines
- Chapter 11 Conic Sections
- Chapter 12 Introduction to Three Dimensional Geometry
- Chapter 13 Limits and Derivatives
- Chapter 15 Statistics
- Chapter 16 Probability
NCERT Solutions Class 11 Maths by Chapters
- Chapter 1 Sets
- Chapter 2 Relations and Functions
- Chapter 3 Trigonometric Functions
- Chapter 4 Principle of Mathematical Induction
- Chapter 5 Complex Numbers and Quadratic Equations
- Chapter 6 Linear Inequalities
- Chapter 7 Permutations and Combinations
- Chapter 8 Binomial Theorem
- Chapter 9 Sequences and Series
- Chapter 10 Straight lines
- Chapter 11 Conic Sections
- Chapter 12 Introduction to Three Dimensional Geometry
- Chapter 13 Limits and Derivatives
- Chapter 14 Mathematical Reasoning
- Chapter 15 Statistics
- Chapter 16 Probability