Algebra 2 Note-taking Guide Algebra 2 - Lesson 9.03 Conditional Probability Please print this out in advance, and as you are working through the lesson, fill in the information and use this as your notes. The goal is to have all the empty boxes checked As you complete this lesson, please check that you can answer: How can you explain the concepts of conditional probability and independence in everyday situations? How can you find the conditional probability of A given B as the fraction of B’s outcomes that also belong to A, and interpret the answer in terms of the model? How can you apply the Addition Rule and interpret the answer in terms of the model? Conditional Probability (page 2) Recall that two events are ____________________ if knowledge of the first outcome does not affect the probability of the second outcome. When two events are not independent, rules for conditional probability will apply. From the last lesson, you already know how to find conditional probability using the probability of each event. Use the space below to complete examples 1 and 2. Pay close attention to how the probability is interpreted in the context of the problem. Example 1: Example 2: Interpreting Probability (page 2) The two-way frequency table below shows the education level and employment status of 242,714 people. A person is randomly selected from this group. Employed Self-Employed Unemployed Total
Algebra 2 Note-taking Guide Algebra 2 - Lesson 9.03 Conditional Probability Please print this out in advance, and as you are working through the lesson, fill in the information and use this as your notes. The goal is to have all the empty boxes checked As you complete this lesson, please check that you can answer: How can you explain the concepts of conditional probability and independence in everyday situations? How can you find the conditional probability of A given B as the fraction of B’s outcomes that also belong to A, and interpret the answer in terms of the model? How can you apply the Addition Rule and interpret the answer in terms of the model? Conditional Probability (page 2) Recall that two events are ____________________ if knowledge of the first outcome does not affect the probability of the second outcome. When two events are not independent, rules for conditional probability will apply. From the last lesson, you already know how to find conditional probability using the probability of each event. Use the space below to complete examples 1 and 2. Pay close attention to how the probability is interpreted in the context of the problem. Example 1: Example 2: Interpreting Probability (page 2) The two-way frequency table below shows the education level and employment status of 242,714 people. A person is randomly selected from this group. Employed Self-Employed Unemployed Total