Sandeep Garg Statistics Class 11
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Sandeep Garg Statistics Class 11 Official

To use the book effectively, you cannot read it like a novel. Here is your strategic guide to the 9 core chapters.

This is the numerical heart of the paper.

There are dozens of economics books on the market. So why this one?

Sandeep Garg’s Statistics for Class 11 is a concise, exam-focused textbook widely used by Indian senior-secondary students following CBSE and similar syllabuses. It breaks down introductory statistical concepts with clear explanations, worked examples, and practice problems aligned to the typical Class 11 curriculum.

The book is famous for its exhaustive question bank. It includes: Sandeep Garg Statistics Class 11

Question:
Calculate the arithmetic mean from the following data:

| Marks | 0–10 | 10–20 | 20–30 | 30–40 | 40–50 | |-------|------|-------|-------|-------|-------| | Students | 5 | 8 | 12 | 7 | 3 |

Solution (as per Sandeep Garg method):

| Class Interval | Mid-value (x) | Frequency (f) | f × x | |----------------|---------------|---------------|--------| | 0–10 | 5 | 5 | 25 | | 10–20 | 15 | 8 | 120 | | 20–30 | 25 | 12 | 300 | | 30–40 | 35 | 7 | 245 | | 40–50 | 45 | 3 | 135 | | Total | | Σf = 35 | Σfx = 825 | To use the book effectively, you cannot read it like a novel

[ \barx = \frac\sum fx\sum f = \frac82535 = 23.57 ]

Answer: Arithmetic Mean = 23.57 marks

Chapter 5: Measures of Central Tendency (Arithmetic Mean)

  • Properties: Sum of deviations from Mean is always 0. Combined Mean formula: $\fracn_1 \barx_1 + n_2 \barx_2n_1 + n_2$.

    • Chapter 6: Median

    Chapter 7: Mode

    Chapter 8: Measures of Dispersion

  • Coefficient of Variation (CV): $$CV = \frac\sigma\barx \times 100$$

    • Chapter 9: Correlation

  • Spearman’s Rank Correlation: Used for qualitative data (beauty, intelligence) or when ranks are given. Formula involves $D^2$ (difference in ranks).

    • Chapter 10: Index Numbers

  • Consumer Price Index (CPI): Important for understanding inflation impact on different income groups (Family Budget Method).