STT 201 Study Guide - Final Guide: Empirical Probability, Sample Space, Conditional Probability
20 Jul 2019
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The complement of an event a consists of all outcomes in the sample space that are not in a. The probabilities of a and of ac add to 1, so p(ac) = 1 - p(a). You survey a sample of 1000 employees at a company and record the age of each. Find the probability of randomly choosing an employee who is not between 25 and 34 years old. Use empirical probability to find p(age 25 to 34) Addition rule for the probability of a or b. For disjoint events , this rule can be simplified to: P(a or b) = p(a) + p(b) - p(a and b) P(a u b) = p(a) + p(b) - p(a b) For disjoint events p(a b) = 0. Can be extended to any number of disjoint events. You select one card from a standard deck. Find the probability that the card is a heart and an 8.
