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JEE Main & Advanced Mathematics Statistics Question Bank Self Evaluation Test - Statistics

  • question_answer
    If the standard deviation of the observations \[-5,-4,-3,-2,-1,0,1,2,3,4,5\] is \[\sqrt{10}\]. The standard deviation of observations \[15,16,17,18,19,20,21,22,23,24,25\] will be

    A) \[\sqrt{10}+20\]

    B) \[\sqrt{10}+10\]

    C) \[\sqrt{10}\]      

    D) None of these

    Correct Answer: C

    Solution :

    [c] The new observations are obtained by adding 20 to each. Hence, \[\sigma \] does not change.


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