Chapter 14 · Class 9 CBSE · Formula Sheet

Statistics Formulas — Class 9 CBSE

Collect data, draw frequency tables and histograms, and compute mean, median, and mode.

Key Formulas

Mean (Raw Data)

\bar{x} = \dfrac{\sum x_i}{n}

Mean (Frequency)

\bar{x} = \dfrac{\sum f_i x_i}{\sum f_i}

Median (Odd n)

\text{Median} = \left(\dfrac{n+1}{2}\right)^{\text{th}} \text{term}

Mode

\text{Most frequently occurring value}

Worked Examples

1Using: Probability

A die is thrown. Find P(getting an even number).

Step 1: Even outcomes: {2, 4, 6} = 3.

Step 2: Total outcomes = 6.

Step 3: P = 3/6 = 1/2.

Answer: 1/2

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More Class 9 CBSE Formulas

Number SystemsPolynomialsCoordinate GeometryLinear Equations in Two VariablesIntroduction to Euclid's GeometryLines & Angles

Frequently Asked Questions

How many formulas are in Class 9 CBSE Statistics?+
There are 4 formulas in the Statistics chapter for Class 9 CBSE. Each formula is essential for solving problems in this topic.
How to remember Statistics formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Statistics formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 9 syllabus for Statistics. Practice applying them to different types of questions for full exam readiness.

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