Conditional Probability

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# Conditional Probability - PowerPoint PPT Presentation

Conditional Probability. “Given X, what is the probability of Y” Example: You’re picking one person at random from the class. G iven the person in the class is a female, what the the probability he or she is blonde? What statisticians would write: P(Blonde | Female)

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## Conditional Probability

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Presentation Transcript
Conditional Probability
• “Given X, what is the probability of Y”
• Example: You’re picking one person at random from the class. Given the person in the class is a female, what the the probability he or she is blonde?
• What statisticians would write: P(Blonde | Female)
• Tips: your total (n, or the number you divide by is only the girls! Not the whole class)
• (# of blondes/#of girls)