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Ex 13.1, 2 - Chapter 13 Class 11 Statistics
Last updated at August 17, 2026 by Teachoo
Mean deviation about mean - Ungrouped
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
Ex 13.1, 2 Find the mean deviation about the mean for the data 38, 70, 48, 40, 42, 55, 63, 46, 54, 44 Mean of the given data = (๐๐ข๐ ๐๐ ๐๐๐ ๐ก๐๐๐๐ )/(๐๐๐ก๐๐ ๐๐ข๐๐๐๐ ๐๐ ๐ก๐๐๐๐ ) ๐ฅ ฬ = (38 + 70 + 48 + 40 + 42 + 55 + 63 + 46 + 54 + 44)/(10 ) = 500/10 = 50 38 38 โ 50 = โ12 70 70 โ 50 = 20 48 48 โ 50 = โ2 40 40 โ 50 = โ10 42 42 โ 50 = โ8 55 63 46 54 44 Mean deviation about mean = ( โ128โ|๐ฅ๐ โ ๐ฅ ฬ | )/10 = 84/10 = 8.4
