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    Question

    What is the standard deviation of first n natural

    numbers?
    A Sq rt [(N^2 -1)/12] Correct Answer Incorrect Answer
    B Sq rt [(N-1)/12] Correct Answer Incorrect Answer
    C Sq rt [(N+1)/12] Correct Answer Incorrect Answer
    D Sq rt [N^2 /12] Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

     

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