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Daylon plc December 05

Forums › Ask ACCA Tutor Forums › Ask the Tutor ACCA AFM Exams › Daylon plc December 05

  • This topic has 1 reply, 2 voices, and was last updated 8 years ago by John Moffat.
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  • November 22, 2016 at 7:15 am #350546
    cyh
    Member
    • Topics: 26
    • Replies: 42
    • ☆☆

    Hi Sir,

    I have queries on the standard deviation calculation.
    As per question, the annual volatility (variance) is 169%.
    when we calculate the standard deviation (sd), why the answer not 1.3 but 0.13.

    because i use square root of the variance to find the sd, which is square root of 1.69.
    but the answer is 0.13

    November 22, 2016 at 2:48 pm #350656
    John Moffat
    Keymaster
    • Topics: 57
    • Replies: 54655
    • ☆☆☆☆☆

    But it looks as though you have answered your own question!

    Take the square root of 169, which is 13% (and 13% is the same as 0.13).

    (What is happening is that the variance is actually “% squared” (despite the fact that the examiner just put a % sign). So it is really 169 x 1/100 x 1/100, which is the same as 0.0169.
    The square root of 0.0169 = 0.13 )

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