find mean deviation about mean for the following data. X1 (5,10,15,20,25). F1 (7,4,6,3,5)
Answers
Answer:
Maybe,Mean Deviation is 6.32
Given : data. X1 (5,10,15,20,25). F1 (7,4,6,3,5)
To find : mean deviation about mean
Solution:
Value (xi) frequency(fi) xi * fi
5 7 35
10 4 40
15 6 90
20 3 60
25 5 125
Total 25 350
Mean = 350/25 = 14
|(xi)-mean | frequency(fi) |(xi)-mean | * fi
9 7 63
4 4 16
1 6 6
6 3 18
11 5 55
Total 25 158
Mean Deviation about Mean = 158/25
= 6.32
Mean Deviation about Mean = 6.32
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