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Find the mean deviation from mean of the following distribution.
C.I 0-10 10-20 20-30 30-40 40-50
Fi 5 8 15 16 6
1 Answer
0
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Solution:

C.I fi xi fIxi dI=|xIˉx| fIdi
0-10 5 5 25 22 110
10-20 8 15 120 12 96
20-30 15 25 375 2 30
30-40 16 35 560 8 128
40-50 6 45 270 18 108
fI=50 fixI=1350 fidi=472

Mean¯x=fixifi

¯x=135050

¯x=27

MD=fidifi

MD=47250

MD.=9.44

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