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CSE 221: Probabilistic Analysis of Computer Systems Topics covered: Conditional probability Independent events Bayes rule Bernoulli trials (Sec. 1.9-1.10)
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Conditional probability Assigning probabilities to events: How does the probability of an event change, given that some information is available about another event.
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Conditional probability (contd..) Example:
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Independent events Definition: Mutually independent events: Pairwise independent events:
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Independent events (contd..) Example:
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Reliability of a series system Description of a series system: Reliability of a component: Reliability of a series system:
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Reliability of a series system (contd..) Example:
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Reliability of parallel systems Definition: only one component is expected to be functioning.
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Reliability of parallel systems: Example
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Reliability of series/parallel systems Components can be arranged in a combination of series/parallel structures.
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Reliability of series/parallel systems: Example
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Bayes rule Definition: Intuition:
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Bayes rule: Example Sequence of three coin tosses:
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Bayes rule: Example (contd..)
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Bayes rule: Example Chip testing:
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Bernoulli trials
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Bernoulli trials: Example Sequence of three coin tosses: What is the probability of 2 heads?
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