RRB NTPC 17 January 2017 Paper

Question : 14 of 120

Marks: +1, -0

The means deviation of the data 3, 10, 10, 4, 7 10, 5, is

Solution:

(4) Mean Deviation

= { ∑ | x - µ | }/{ n }

Mean

= { 3 + 10 + 10 + 4 + 7 + 10 + 5 } /{ 7 } = 7

Mean deviation for each will beValue Distance from Mean = 7

\table 3,4;4,3;5,2;7,0;10,3;10,3;10,3

Mean deviation

= { 4 + 3 + 2 + 0 + 3 + 3 + 3 } /{ 7 }

= { 18 }/{ 7 }

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