Question

Find the mean deviation about the mean for the data:
Income per dayNumbers of persons
0-1004
100-2008
200-3009
300-40010
400-5007
500-6005
600-7004
700-8003

Medium

Solution

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 Income
 per day
 Number
 of persons
 
 Mid-point
 
   
 0-100 4 50 200 308 1232
 100-200 8 150 1200 208 1664
 200-300 9 250 2250 108 972
 300-400 10 350 3500 8 80
 400-500 7 450 3150 92 644
 500-600 5 550 2750 192 960
 600-700 4 650 2600 292 1168
  50  17900  7896
Here 



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