Ch7 Random Phenomena and Probability
Random Phenomena-we can’t predict the individual outcomes,but we can hope to understand
characteristics of their long-run behavior.
For any Random Phenomenon,each attempt = trial.
• A trail generates an outcome.
• Combination of outcomes = event.
• All possible outcomes = sample space.
• S or ΩΩ.
The probability of an event is its long-run relative frequency.▯
Independence means that the outcome of one trial doesn’t inﬂuence or change the outcome of
mutually exclusive / disjoint-no outcomes in common
The Law of Large Numbers (LLN) states that if the events are independent,then as the number of