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Thread: Need help on lognormal distribution

  1. #1
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    Need help on lognormal distribution




    Hello

    I'm a newbie here. I need help on how to find mean and standard deviation for a lognormal distribution. I've been searching on the internet but cant find the answer.


    Here is my question.

    Let say

    X = b x c x sqrt(d)

    and b is assumed to follow lognormal distribution with mean 1.26 and standard deviation 0.33.

    c is a constant which is equal to 1.392

    and d is also follow lognormal distribution with mean 0.833 and standard deviation 0.15

    so X should also be lognormal distributed right?

    My question is what is the mean value and standard deviation of parameter X?

    Appreciate if someone can help me here

    Thanks

  2. #2
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    Re: Need help on lognormal distribution


    Take the logarithm of:

    X = b x c x sqrt(d)
    What will it be then?

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