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JEE Main & Advanced AIEEE Paper (Held On 11 May 2011)

  • question_answer
    A scientist is weighing each of 30 fishes. Their mean weight worked out is 30 gm and a standard deviation of gm. Later, it was found that the measuring scale was misaligned and always under reported every fish weight by 2 gm. The correct mean and standard deviation (ingm) of fishes are respectively:     AIEEE  Solved  Paper (Held On 11 May  2011)

    A)  32,2

    B)  32,4

    C)  28,2

    D)  28,4

    Correct Answer: A

    Solution :

                    Correct mean = observed mean + 2 30 + 2 = 32 Correct S.D. = observed S.D. = 2


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