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# 7-1 - Chapter 7.1 Some Denitions We now begin our study of...

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Chapter 7.1: Some Definitions We now begin our study of probability. With probability, we are interested in the outcomes of an experi- ment . An experiment is any activity where we can measure, or observe the results. As an example, flipping a coin three times and noticing the sequence of heads and tails is an experiment. Our observations are the outcomes of an experiment. In set theory, the set which contained all elements under discussion was called the universe, and had the symbol U . In probability theory, we call this set the sample space , and give it the symbol S . The sample space contains all possible outcomes of an experiment. Much like the universe, the sample space may contain a finite or an infinite number of outcomes. We will only be concerned with experi- ments where the sample space is finite. Inside the universe, we had different subsets (collections of elements). In probability, we call these subsets events , and we call the elements they contain sample points .

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7-1 - Chapter 7.1 Some Denitions We now begin our study of...

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