What is $P(Amid B)(Cmid D)$? Is this the same as $P(Amid B) times P(Cmid D)$?












2












$begingroup$


I'm curious about the general case but also need to understand if $P(A|B)(C|D)$ is the same as $P(A|B) times P(C|D).$



In equation (7), it states



enter image description here



Is this the same as $P(u|f,s) times P(f|s)$ ?



Example Usage



The article is available at https://mechanicaldesign.asmedigitalcollection.asme.org/article.aspx?articleid=2297650










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    2












    $begingroup$


    I'm curious about the general case but also need to understand if $P(A|B)(C|D)$ is the same as $P(A|B) times P(C|D).$



    In equation (7), it states



    enter image description here



    Is this the same as $P(u|f,s) times P(f|s)$ ?



    Example Usage



    The article is available at https://mechanicaldesign.asmedigitalcollection.asme.org/article.aspx?articleid=2297650










    share|cite|improve this question











    $endgroup$















      2












      2








      2


      1



      $begingroup$


      I'm curious about the general case but also need to understand if $P(A|B)(C|D)$ is the same as $P(A|B) times P(C|D).$



      In equation (7), it states



      enter image description here



      Is this the same as $P(u|f,s) times P(f|s)$ ?



      Example Usage



      The article is available at https://mechanicaldesign.asmedigitalcollection.asme.org/article.aspx?articleid=2297650










      share|cite|improve this question











      $endgroup$




      I'm curious about the general case but also need to understand if $P(A|B)(C|D)$ is the same as $P(A|B) times P(C|D).$



      In equation (7), it states



      enter image description here



      Is this the same as $P(u|f,s) times P(f|s)$ ?



      Example Usage



      The article is available at https://mechanicaldesign.asmedigitalcollection.asme.org/article.aspx?articleid=2297650







      probability notation






      share|cite|improve this question















      share|cite|improve this question













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      edited Jan 16 at 23:08









      jordan_glen

      1




      1










      asked Jan 16 at 22:23









      Norman MNorman M

      132




      132






















          1 Answer
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          $begingroup$

          Your understanding is correct. I think there is a typo in the original source. In general it holds that
          begin{equation}
          p(x,y|z) = p(x|y,z) p(y|z)
          end{equation}

          and therefore,
          begin{equation}
          p(x|z) = sum_y p(x,y|z) = sum_y p(x|y,z) p(y|z)
          end{equation}






          share|cite|improve this answer











          $endgroup$













          • $begingroup$
            Thank you for helping.
            $endgroup$
            – Norman M
            Jan 16 at 22:33










          • $begingroup$
            You are welcome. Please accept the answer if you found it helpful.
            $endgroup$
            – user144410
            Jan 18 at 16:09












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          $begingroup$

          Your understanding is correct. I think there is a typo in the original source. In general it holds that
          begin{equation}
          p(x,y|z) = p(x|y,z) p(y|z)
          end{equation}

          and therefore,
          begin{equation}
          p(x|z) = sum_y p(x,y|z) = sum_y p(x|y,z) p(y|z)
          end{equation}






          share|cite|improve this answer











          $endgroup$













          • $begingroup$
            Thank you for helping.
            $endgroup$
            – Norman M
            Jan 16 at 22:33










          • $begingroup$
            You are welcome. Please accept the answer if you found it helpful.
            $endgroup$
            – user144410
            Jan 18 at 16:09
















          2












          $begingroup$

          Your understanding is correct. I think there is a typo in the original source. In general it holds that
          begin{equation}
          p(x,y|z) = p(x|y,z) p(y|z)
          end{equation}

          and therefore,
          begin{equation}
          p(x|z) = sum_y p(x,y|z) = sum_y p(x|y,z) p(y|z)
          end{equation}






          share|cite|improve this answer











          $endgroup$













          • $begingroup$
            Thank you for helping.
            $endgroup$
            – Norman M
            Jan 16 at 22:33










          • $begingroup$
            You are welcome. Please accept the answer if you found it helpful.
            $endgroup$
            – user144410
            Jan 18 at 16:09














          2












          2








          2





          $begingroup$

          Your understanding is correct. I think there is a typo in the original source. In general it holds that
          begin{equation}
          p(x,y|z) = p(x|y,z) p(y|z)
          end{equation}

          and therefore,
          begin{equation}
          p(x|z) = sum_y p(x,y|z) = sum_y p(x|y,z) p(y|z)
          end{equation}






          share|cite|improve this answer











          $endgroup$



          Your understanding is correct. I think there is a typo in the original source. In general it holds that
          begin{equation}
          p(x,y|z) = p(x|y,z) p(y|z)
          end{equation}

          and therefore,
          begin{equation}
          p(x|z) = sum_y p(x,y|z) = sum_y p(x|y,z) p(y|z)
          end{equation}







          share|cite|improve this answer














          share|cite|improve this answer



          share|cite|improve this answer








          edited Jan 16 at 22:33

























          answered Jan 16 at 22:31









          user144410user144410

          1,0412719




          1,0412719












          • $begingroup$
            Thank you for helping.
            $endgroup$
            – Norman M
            Jan 16 at 22:33










          • $begingroup$
            You are welcome. Please accept the answer if you found it helpful.
            $endgroup$
            – user144410
            Jan 18 at 16:09


















          • $begingroup$
            Thank you for helping.
            $endgroup$
            – Norman M
            Jan 16 at 22:33










          • $begingroup$
            You are welcome. Please accept the answer if you found it helpful.
            $endgroup$
            – user144410
            Jan 18 at 16:09
















          $begingroup$
          Thank you for helping.
          $endgroup$
          – Norman M
          Jan 16 at 22:33




          $begingroup$
          Thank you for helping.
          $endgroup$
          – Norman M
          Jan 16 at 22:33












          $begingroup$
          You are welcome. Please accept the answer if you found it helpful.
          $endgroup$
          – user144410
          Jan 18 at 16:09




          $begingroup$
          You are welcome. Please accept the answer if you found it helpful.
          $endgroup$
          – user144410
          Jan 18 at 16:09


















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