Lecture9_8211_Chapt - Lecture 9 Chapter 2 Monday September 22th Independence Two events A and B are independent if P A B = P A and they are

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Lecture 9 – Chapter 2 Monday, September 22 th
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Independence ± Two events A and B are independent if and they are dependent otherwise. ± That means they are independent if knowing that event B has occurred this doesn’t affect the probability of event A to happen ( ) ( ) / PAB PA =
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Strange fact ± Why in the definition of independence we do not require at the same time that ? ( ) ( ) / P BA P B =
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Example 2.31 page 84
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Independence ± If A and B are independent then: ² A and B c are independent ² A c and B are independent ² A c and B c are independent
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Proposition
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This note was uploaded on 09/23/2009 for the course STAT 318 taught by Professor Staff during the Fall '08 term at Pennsylvania State University, University Park.

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Lecture9_8211_Chapt - Lecture 9 Chapter 2 Monday September 22th Independence Two events A and B are independent if P A B = P A and they are

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