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Example 5 - Chapter 13 Class 11 Statistics
Last updated at August 2, 2026 by Teachoo
Mean deviation about median - Discrete Frequency
Chapter 13 Class 11 Statistics
Concept wise
- Mean deviation about mean - Ungrouped
- Mean deviation about mean - Discrete Frequency
- Mean deviation about mean - Continuous frequency distibution
- Mean deviation about median - Ungrouped
-
Mean deviation about median - Discrete Frequency
- Mean deviation about median - Continuous frequency distibution
- Standard deviation and variance - Ungrouped data
- Standard deviation and variance - Discrete frequency (grouped data)
- Standard deviation and variance - Continuous frequency (grouped data)
- Co-efficient of variation
- Indirect questions - Multiplication of observation
- Indirect questions - finding remaining observations
- Indirect questions - Incorrect observation
Transcript
Example 5 - Chapter 15 Class 11 Statistics - NCERT Find the mean deviation about the median for the following data: xi 3 6 9 12 13 15 21 22 fi 3 4 5 2 4 5 4 3 c.f is Cumulative frequency N = 29 (odd) β΄ Median = ((π + 1)/2)^π‘βterm = ((29 + 1)/2)^π‘β term = (30/2)^π‘β term = 15th term Now, finding mean deviation about median As, 15th term lie in c.f of 21. Median = 30 β128βππ = 29 β128βππ |π₯π βM| = 148 β΄ Mean Deviation = (Ξ£ π_π |π₯_(π )β M|)/π_π = 148/29 = 5.1
