PSYC 210 Lecture 5: Probability for Discrete Variables

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 210
• Professor: Joe Thompson

Document Summary

Event/outcome (a): a subset of the sample space. Sample space (s): a set of possible events. Discrete probabilities: where events are discrete and finite and where we are frequentists - always a proportion involving events and the sample space. When we talk about possibilities, it"s always going to be a proportion - some event over all possibilities. In a simple example of a bag of colored marbles, the event/outcome might be obtaining a blue marble from. The sample space is the bag, because it contains all possible events. 0 is less than or equal to p(a) which is less than or equal to 1, where a is any event occurring within a sample space. Always think about possibilities as proportions (a set of events and a sample space of possible events) Don"t change the sample space of the question as you"re doing the question.