Question

Find the mean deviation about the median for the data
1521273035
35678

Medium

Solution

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   Cumulative frequency 
 15 3 3 15 45
 21 5 8 9 45
 27 6 14 3 18
 30 7 21 0 0
 35 8 29 5 40
 Total 29   148
Here (odd)
Median  
i.e.
Since, occurs in the cumulative frequency . The corresponding observation is .
Hence,
Mean deviation about median

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