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Probability, 0 means an impossible event, Includes all possible outcomes,…
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- 0 means an impossible event
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- Mutually exclusive events can't happen simultaneously
- Probabilities of these events can be added
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- Random events happen without predictable patterns
- Probability based on long-run relative frequencies
- Predicts patterns for large number of observations
- Law of large numbers: Sample outcome approach theoretical probabilities over time
- Probability distributions describe expected patterns
Sampling error happens because samples are different than population
- Researchers use probability to evaluate outcomes
- Researchers compares outcomes to probabilities