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What is the mean deviation about the mean for the data 4,7,8,9,10,12,13,17 ?

Options

  1. A2.5
  2. B3
  3. C3.5
  4. D4

Correct answer

B. 3

Step-by-step solution

Mean = 4+7+8+9+10+12+13+17 8 = 80 8 =10 Mean deviation aligned & |4-10|+|7-10|+|8-10|+|9-10|+|10-10| = & (|12-10|+|13-10|+|17-10| 8 = & 6+3+2+1+0+2+3+7 8 = 24 8 =3 . aligned

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