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How to find p(Y|X), if Y=X+Z and I know the distribution of Z?


Marginal DistributionChi Squared Distribution with $mu = 0$, $sigma^2 neq 1$Let $X_1$ and $X_2$ are independent $N(0, sigma^2)$ random variables. What is the distribution of $X_1^2 + X_2^2$?Find the distribution of $X_1^2 + X_2^2$?What is the magnitude of Complex random variable Gaussian Case?Find the Distribution of the following;Distribution name and PDFIf $X$ and $Y$ are two NON independent random normal variables, what is the distribution of $Z = frac{X}{Y^n}$Show that the random variables have the same distributionMean and variance of uniform distribution where maximum depends on product of RVs with uniform and Bernoulli













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Suppose I have three random variables $x,y,z$ and they have a relation as
$y=x+z$ now I have the distribution of $z sim p(z)$, how to find $p(y|x)$.
I know intuitively if I have $zsim N(0,sigma^2)$ then $x$ will just impact its mean and so $p(y|x)sim N(x,sigma^2)$.



But I want to know general mathematical procedures to find $p(y|x)$, specifically, if $zsim p(z)$ where $p(z)$ have an undefined MGF and mean and variance both are infinite. Further, I assume that $x$ and $z$ are independent of one another.










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  • 1




    $begingroup$
    @Kavi Rama Murthy I assume $x$ and $z$ are independent of one another.
    $endgroup$
    – Ankit
    yesterday
















0












$begingroup$


Suppose I have three random variables $x,y,z$ and they have a relation as
$y=x+z$ now I have the distribution of $z sim p(z)$, how to find $p(y|x)$.
I know intuitively if I have $zsim N(0,sigma^2)$ then $x$ will just impact its mean and so $p(y|x)sim N(x,sigma^2)$.



But I want to know general mathematical procedures to find $p(y|x)$, specifically, if $zsim p(z)$ where $p(z)$ have an undefined MGF and mean and variance both are infinite. Further, I assume that $x$ and $z$ are independent of one another.










share|cite|improve this question











$endgroup$








  • 1




    $begingroup$
    @Kavi Rama Murthy I assume $x$ and $z$ are independent of one another.
    $endgroup$
    – Ankit
    yesterday














0












0








0





$begingroup$


Suppose I have three random variables $x,y,z$ and they have a relation as
$y=x+z$ now I have the distribution of $z sim p(z)$, how to find $p(y|x)$.
I know intuitively if I have $zsim N(0,sigma^2)$ then $x$ will just impact its mean and so $p(y|x)sim N(x,sigma^2)$.



But I want to know general mathematical procedures to find $p(y|x)$, specifically, if $zsim p(z)$ where $p(z)$ have an undefined MGF and mean and variance both are infinite. Further, I assume that $x$ and $z$ are independent of one another.










share|cite|improve this question











$endgroup$




Suppose I have three random variables $x,y,z$ and they have a relation as
$y=x+z$ now I have the distribution of $z sim p(z)$, how to find $p(y|x)$.
I know intuitively if I have $zsim N(0,sigma^2)$ then $x$ will just impact its mean and so $p(y|x)sim N(x,sigma^2)$.



But I want to know general mathematical procedures to find $p(y|x)$, specifically, if $zsim p(z)$ where $p(z)$ have an undefined MGF and mean and variance both are infinite. Further, I assume that $x$ and $z$ are independent of one another.







probability-theory statistics probability-distributions






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edited yesterday







Ankit

















asked yesterday









AnkitAnkit

1829




1829








  • 1




    $begingroup$
    @Kavi Rama Murthy I assume $x$ and $z$ are independent of one another.
    $endgroup$
    – Ankit
    yesterday














  • 1




    $begingroup$
    @Kavi Rama Murthy I assume $x$ and $z$ are independent of one another.
    $endgroup$
    – Ankit
    yesterday








1




1




$begingroup$
@Kavi Rama Murthy I assume $x$ and $z$ are independent of one another.
$endgroup$
– Ankit
yesterday




$begingroup$
@Kavi Rama Murthy I assume $x$ and $z$ are independent of one another.
$endgroup$
– Ankit
yesterday










1 Answer
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The distribution function of $Y$ given $X$ is $F_Z(y-X)$ and the density function is $f_Z(y-X)$ where $F_Z$ and $f_Z$ are the disrtibution function and the density of $Z$ respectively.






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    $begingroup$

    The distribution function of $Y$ given $X$ is $F_Z(y-X)$ and the density function is $f_Z(y-X)$ where $F_Z$ and $f_Z$ are the disrtibution function and the density of $Z$ respectively.






    share|cite|improve this answer









    $endgroup$


















      0












      $begingroup$

      The distribution function of $Y$ given $X$ is $F_Z(y-X)$ and the density function is $f_Z(y-X)$ where $F_Z$ and $f_Z$ are the disrtibution function and the density of $Z$ respectively.






      share|cite|improve this answer









      $endgroup$
















        0












        0








        0





        $begingroup$

        The distribution function of $Y$ given $X$ is $F_Z(y-X)$ and the density function is $f_Z(y-X)$ where $F_Z$ and $f_Z$ are the disrtibution function and the density of $Z$ respectively.






        share|cite|improve this answer









        $endgroup$



        The distribution function of $Y$ given $X$ is $F_Z(y-X)$ and the density function is $f_Z(y-X)$ where $F_Z$ and $f_Z$ are the disrtibution function and the density of $Z$ respectively.







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered yesterday









        Kavi Rama MurthyKavi Rama Murthy

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        65.8k42767






























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