Wgu C955 Applied Probability And Statistics. Questions And Answers.
set a collection of things, usually numbers subset a collection of information that is part of a larger set empty set a set with no elements union collection of all elements listed in multiple sets intersection has elements of multiple sets theoretical probability is computed by dividing the number of outcomes in which a desired event occurs by the number of total outcomes empirical probability calculated by conducting trials and recording the results; data gathering random experiments experiment with uncertain outcome in which all outcomes are independent of each other Sample space the set of possible outcomes for an experiment Sample size the number of individuals measured or observed in a study; number of possible outcomes in a trial or experiment Complement the occurrence of an event NOT happening; the opposite Disjoint two events that cannot occur at the same time; P(A or B)=P(A)+P(B) independent events not affected by trials or other events; P(A and B)=P(A) X P(B) dependent events the occurrence of the first outcome affects the probability of the second outcome; P(A and B)=P(A) X P(B|A) Conditional probability the probability of an event occurring given that another event has occurred; P(B∣A)=P(A and B)P(A)
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