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Statistics
probabilities ch 4
Question | Answer |
---|---|
Probability Experiment | Process which leads to well-defined results call outcomes |
Outcome | The result of a single trial of a probability experiment |
Sample Space | Set of all possible outcomes of a probability experiment |
Event | One or more outcomes of a probability experiment |
Classical Probability | Uses the sample space to determine the numerical probability that an event will happen. Also called theoretical probability. |
Equally Likely Events | Events which have the same probability of occurring. |
Complement of an Event | All the events in the sample space except the given events |
Empirical Probability | Uses a frequency distribution to determine the numerical probability. An empirical probability is a relative frequency. |
Subjective Probability | Uses probability values based on an educated guess or estimate. It employs opinions and inexact information. |
Mutually Exclusive Events | Two events which cannot happen at the same time. |
Independent Events | Two events are independent if the occurrence of one does not affect the probability of the other occurring |
Dependent Events | Two events are dependent if the first event affects the outcome or occurrence of the second event in a way the probability is changed. |
Conditional Probability | The probability of an event occurring given that another event has already occurred |
Bayes' Theorem | A formula which allows one to find the probability that an event occurred as the result of a particular previous event. |