Class 11 Mathematics — Chapter 15: Statistics
67 practice questions · 22 Easy · 22 Medium · 23 Hard
Practise Class 11 Mathematics Chapter 15, "Statistics", with 67 NCERT-aligned multiple-choice questions. The set is split into 22 Easy, 22 Medium and 23 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main and JEE Advanced.
"Statistics" is one of the chapters where problem-solving speed, formula recall and step-by-step reasoning really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Statistics, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Mathematics mastery score. A few sample questions are shown below; sign in free to practise all 67.
Key concepts: Statistics (Class 11 Mathematics)
This chapter covers measures of dispersion — range, mean deviation, variance and standard deviation — for grouped and ungrouped data.
- Measures of dispersion
- Describe how spread out data is around a central value; range is the simplest (max − min).
- Mean deviation
- The mean of the absolute deviations of observations from the mean or median.
- Variance
- The mean of the squared deviations from the mean; denoted σ².
- Standard deviation
- The positive square root of the variance (σ); in the same units as the data.
- Coefficient of variation
- CV = (σ/mean)×100; compares variability of two data sets with different means.
Key formulas — Statistics
💡 Exam tips for Statistics
- Standard deviation is in the same units as the data; variance is in squared units.
- Use the coefficient of variation to compare consistency between two data sets — lower CV = more consistent.
Sample questions
Mean of 2,4,6,8,10:
30/5=6.
Variance is the:
σ² = Σ(xᵢ−x̄)²/n.
Mean deviation about mean uses:
MD = Σ|xᵢ−x̄|/n.
Statistics — FAQs
What are the key concepts in Class 11 Mathematics Statistics?+
This chapter covers measures of dispersion — range, mean deviation, variance and standard deviation — for grouped and ungrouped data. Key ideas include Measures of dispersion, Mean deviation, Variance, Standard deviation, Coefficient of variation.
What does Class 11 Mathematics Chapter 15 (Statistics) cover on XamBaaz?+
It covers 67 NCERT-aligned MCQs on "Statistics" — 22 Easy, 22 Medium and 23 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main and JEE Advanced.
Are these "Statistics" questions free to practise?+
Yes — sign in with Google to practise "Statistics" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Statistics" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Practise all 67 questions free
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