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10th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    Mean deviation of the data 3, 10, 10, 4, 7, 10, 5, from the mean is

    A)  2                                

    B)  2.57         

    C)  3                                

    D)  3.75

    Correct Answer: B

    Solution :

    (b): here; mean =            \[\therefore \] Required M.D. \[=\frac{1}{7}\left\{ \begin{align}   & |3-7|+|10-7|+|10-7|+|4-7| \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+|7-7|+|10-7|+|5-7| \\ \end{align} \right\}\] \[=\frac{18}{7}=2.57\]


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