ADMS 2320 Lecture Notes - Lecture 3: Sample Space, Marginal Distribution, Conditional Probability
15 Sep 2016
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Document Summary
Use information to make decision on what"s occurring. Outcomes have to be mutually exclusive (heads and tails happens at the same time) Every probability of an event has to lie between 0 and 1. Sum of probability has to sum up to 1. Approaches to assigning probabilities and interpretation of probability. Relative frequency approach is assign the probability based on outcome. Subjective approach is just assign the probability you think are going to happen: this approach is used the most because people believe their opinion are better than what the data is telling them. Intersection is the probability associated with two events happening at the same time. Marginal probability is the total of all of your events. Example 6. 1: on separate sheet of paper. Marginal event has to match primary event in condition statement. When calculating, your condition and marginal have to match. The numbers are different it means the events are dependent since b 2 influences a1.
