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Problem: mean deviation about mode {{10,3},{11,12},{12,18},{13,12},{14,3}} [ Calculator, Method and examples ]

Solution:
Your problem -> mean deviation about mode {{10,3},{11,12},{12,18},{13,12},{14,3}}

 x(1) f(2) |x-Z|=|x-12|(3) f*|x-Z|(4)=(2)xx(3) 10 3 2 6 11 12 1 12 12 18 0 0 13 12 1 12 14 3 2 6 --- --- --- --- -- n=48 -- sum f*|x-Z|=36

Mode :
the frequency of observation 12 is maximum (18)

:. Z = 12

Mean deviation of Mode
delta bar x = (sum f*|x - Z|)/n

delta bar x = 36/48

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