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## Statistics Formulas for Class 11 Maths Chapter 15

Are you looking for Statistics formulas for class 11 Chapter 15? Today, we are going to share Statistics formulas for class 11 Chapter 15 according to student requirements. You are not a single student who is searching Statistics formulas for class 11 Chapter 15. According to me, thousands of students are searching Statistics formulas for class 11 Chapter 15 per month. If you have any doubt or issue related to Statistics formulas then you can easily connect with through social media for discussion. Statistics formulas will very helpful to understand the concept and questions of the chapter Statistics. I would like to suggest you remember Statistics formulas for the whole life. It also helps you with higher studies.

1. Mean Deviation for the ungrouped data:
• (i) $$M.D.(\bar x)=\frac{\sum \left | x_i-\bar x \right |}{n}$$
• (ii) $$M.D.(M)=\frac{\sum \left | x_i-M \right |}{n}$$
2. Mean Deviation for the grouped data:
• (i) $$M.D.(\bar x)=\frac{\sum f_i|x_i-\bar x|}{N}$$
• (ii) $$M.D.(M)=\frac{\sum f_i|x_i-M|}{N}$$
3. Variance and Standard Deviation for the ungrouped data:
• (i) $$\sigma ^2=\frac{1}{N}\sum (x_i-\bar x)^2$$
• (ii) $$\sigma=\sqrt{\frac{1}{N}\sum (x_i-\bar x)^2}$$
4. Variance and Standard Deviation of a frequency distribution (discrete):
• (i) $$\sigma ^2=\frac{1}{N}\sum f_i(x_i-\bar x)^2$$
• (ii) $$\sigma=\sqrt{\frac{1}{N}\sum f_i(x_i-\bar x)^2}$$
5. Variance and Standard Deviation of a frequency distribution (continuous):
• (i) $$\sigma ^2=\frac{1}{N}\sum f_i(x_i-\bar x)^2$$
• (ii) $$\sigma=\frac{1}{N}\sqrt{N\sum f_ix_i^2-(\sum f_ix_i)^2}$$
6. 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 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