10th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    If the SD of \[{{x}_{1}},{{x}_{2}},{{x}_{3}},.........{{x}_{n}}\] is 2.5 then find SD of \[{{x}_{1}}+3,{{x}_{2}}+3,{{x}_{3}}+3,.........{{x}_{n}}+3\].

    A)  5.5                              

    B)  3

    C)  2.5      

    D)  More data required

    Correct Answer: C

    Solution :

    (c): SD does not alter when each term is increased by a fixed constant.                     


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