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Statistics EXERCISE 13.1 Solutions
- Q1: Find the mean deviation about the mean for the data: 4, 7, 8, 9, 10, 12, 13, 17
- Q2: Find the mean deviation about the mean for the data: 38, 70, 48, 40, 42, 55, 63, 46, 54, 44
- Q3: Find the mean deviation about the median for the data: 13, 17, 16, 14, 11, 13, 10, 16, 11, 18, 12, 17
- Q4: Find the mean deviation about the median for the data: 36, 72, 46, 42, 60, 45, 53, 46, 51, 49
- Q5: Find the mean deviation about the mean for the data: $x_i$: 5 10 15 20 25 $f_i$: 7 4 6 3 5
- Q6: Find the mean deviation about the mean for the data: $x_i$: 10 30 50 70 90 $f_i$: 4 24 28 16 8
- Q7: Find the mean deviation about the median for the data: $x_i$: 5 7 9 10 12 15 $f_i$: 8 6 2 2 2 6
- Q8: Find the mean deviation about the median for the data: $x_i$: 15 21 27 30 35 $f_i$: 3 5 6 7 8
- Q9: Find the mean deviation about the mean for the data:
- Q10: Find the mean deviation about the mean for the data:
- Q11: Find the mean deviation about median for the following data:
- Q12: Calculate the mean deviation about median age for the age distribution of 100 persons given below: [Hint Convert the given data into continuous frequency distribution by subtracting 0.5 from the lower limit and adding 0.5 to the upper limit of each class interval]
Other Exercises for CBSE - Class 11 Mathematics Statistics
Chapters in CBSE - Class 11 Mathematics
Top Tutors who teach Statistics
Top Tutor 
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7 yrs of Exp 
73 students 
3015 hrs of classes completed 
400 per hour 
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Top Tutor Katira Maharaja Hata, Arrah 4 yrs of Exp 12 students 1843 hrs of classes completed 600 per hour Online Classes 
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Top Tutor Ashok Nagar D' Souza Layout, Bangalore 10 yrs of Exp 4 students 899 hrs of classes completed 700 per hour Online Classes 10+ years of experience teaching Mathematics for grades 10 to 12. • Consistent record of 100% academic results. • Very friendly and supportive learning environment. • Encourages students to ask questions freely and confidently. • Strong focus on conceptual clarity and problem-solving skills. • Helps students build confidence and excel in Mathematics. • Fee structure for one-to-one classes: ₹800 per hour.
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Top Tutor Bhestan, Surat 5 yrs of Exp 2 students 860 hrs of classes completed 500 per hour Online Classes I have over 5 years of experience teaching Class 11 CBSE students in Physics, Chemistry, and Mathematics, following the latest CBSE and NCERT curriculum and examination pattern. My teaching approach focuses on building strong conceptual foundations while developing problem-solving skills required for board examinations and competitive-level questions. I explain every topic in a structured and student-friendly manner, starting from basic concepts and gradually moving towards application-based and higher-order questions. Special emphasis is given to NCERT theory, important derivations, numerical problems, diagrams, formulas, reactions, and previous-year examination patterns. Over the years, I have helped many Class 12 students improve their academic performance, with several students scoring 90% and above in their board examinations. I regularly identify individual learning gaps and provide targeted practice, revision, doubt-solving, and exam-oriented guidance. My goal is not only to help students score high marks but also to make Physics, Chemistry, and Mathematics clear, logical, and easy to understand through consistent practice and personalized guidance.
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