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chapter3 acct

chapter3 acct - Chapter 3 Probability 3.1 Events sample...

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1 Chapter 3 Probability 3.1 Events, sample space, and probability Basic definitions: An ______________ is an act of observation that leads to a single outcome that cannot be predicted with certainty. A _______________ (or simple event) is the most basic outcome of an experiment. A _______________ (denoted S) is the collection of all possible outcomes of an experiment. An ______________ is a specific collection of sample points. Examples: 1. Experiment : toss a coin and observe the up face. Sample points : ______________ Sample space: _____________ Event A: head observed ____________ 2. Experiment: toss a die and observe the up face. Sample points : ____________ Sample space: _____________ Event A: even # observed ____________ Event B: # observed at least 3 _______________ 3. Experiment : toss two coins and observe the up faces. Sample space: S: _________________ Event A: at least one head observed _________________ 4. Experiment : toss three coins and observe the up faces. Sample space: S: __________________________________________________ Event A : at least one tail observed A: __________________________________________ 5. Experiment: Weather forecast (sunny, cloudy, rain) Sample space: ________________________ Event A : it won’t rain today. ___________________ Venn diagram: The ______________ of a _______________: measures the likelihood that the outcome will occur for a large number repetition.

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