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Ex 13.1, 7 - 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
Ex15.1, 7 Find the mean deviation about the median for the data. The given observations are already in ascending order.Adding a column corresponding to cumulative frequencies of the given data, we obtain the following table. c.f = cumulative frequency N = 26 (even) Median = (( /2)^ +( /2 + 1)^ )/2 = ((26/2)^ + (26/2 +1)^ )/2 = ( 13 ^ + 14 ^ )/2 As both observations lie in the c.f of 14 13th term = 14th term = 7 Median = (7 + 7 )/2=13 128 = 26 128 | M| = 84 Mean Deviation = ( _ | _( M) |)/ _ = 84/26 = 3.23
