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probability - Coggle Diagram
probability
basic notation
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P(A|B) - conditional probability that event A occurs, given that event B has occurred
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expected value
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FORMULA: To find the expected value, E(X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as E ( X ) = μ = ∑ x P ( x )
purpose of probability
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Meteorologists, for instance, use weather patterns to predict the probability of rain. In epidemiology, probability theory is used to understand the relationship between exposures and the risk of health effects.
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expected frequency
DEFINITION: the number of times we would expect an event to occur over a given number of trials that take place during an experiment
CALCULATION: to find the expected frequency, we multiply the probability of that event taking place by the number of trials of the experiment.
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