# STAB22H3 Chapter 4: Chapter 4

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###### STAB22H3 Full Course Notes

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## Document Summary

Probability - a pattern that emerges clearly only after many repetitions. The proportion of times the outcome will occur in a long series of repetitions. Probability describes only what happens in the long run. (repetitive trials) Random in statistics is a kind of order that emerges in the long run. Random when the individual outcomes are uncertain but there is a regular distribution of outcomes in a large number of repetitions. Probability (random) repetitive trials (look at overall picture) Ex: fair coin = head and tail sides. Simulations useful when a lot trials are down without being practical. Ex: dice, cards, or spinning a roulette wheel, gambling. Probability model description of random phenomenon in the language of mathematics. The sample space (s) of a random phenomenon is the set of all possible outcomes. Each possible outcome is a sample and the sample space contains all possible samples. www. notesolution. com. Ex 4. 6 sample space for tossing a coin four times.