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Find the mean deviation about median for...

Find the mean deviation about median for the following data : Marks 0-10 10-20 20-30 30-40 40-50 50-60 Number of 6 8 14 16 4 2 Girls

Text Solution

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here, the total observation are 50
THus, the median is `n/2=50/2=25`
Median class interval is 20-30
we have,
`l=20,c.f=14,f=14 and h=10`
Thus, median =
`=l+(m-cf)/fxxh`
`=20+(25-13)/15xx10`
...
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