Calculate mean deviation from arithmetic mean and median for the following data : Mid Value 35 40 45 50 55 Frequency 2 5 8 6 4
Answers
Given : data : Mid Value 35 40 45 50 55 Frequency 2 5 8 6 4
To find : mean deviation from arithmetic mean
Median
Solution:
Mid value Frequency CF Mid value * frequency
35 2 2 70
40 5 7 200
45 8 15 360
50 6 21 300
55 4 25 220
25 1150
Mean = 1150/25 = 46
Median = 42.5 + 5*(25/2 - 7)/ 8
= 42.5 + 3.4375
= 45.9375
mean deviation from arithmetic mean
Mid value Frequency Mid value * frequency
|35-46| = 11 2 22
|40-46| = 6 5 30
|45-46| = 1 8 8
|50-46| = 4 6 24
|55-46| = 9 4 36
25 120
mean deviation from arithmetic mean = 120/25 = 4.8
mean deviation from arithmetic mean = 4.8
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