STAT 2507 Lecture 5: Chapter 4: Probability and Probability Distribution - Sep 21, 2015
11 Oct 2015
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Stat 2507 chapter 4: probability and probability distribution. In chapter 2 & 3, we used graphs & numerical measures to describe data sets which were usually samples. We measured how often using: relative frequency = frequency/sample size. As n gets larger: sample (population) and how often = relative frequency (probability) Experiment: process by which observation (or measurement) is obtained: experiment: record an age, experiment: toss a die, experiment: record an opinion (yes, no, experiment: toss 2 coins. Simple event: outcome that"s observed on single repetition of experiment: basic element to which probability is applied, 1 & only 1 simple event can occur when experiment is performed. Each simple event will be assigned a probability, measuring how often it occurs. Set of all simple events of an experiment = sample space, s. Simple events: e1, e2, e3, e4, e5, e6. Sample space: s = { e1, e2, e3, e4, e5, e6} Events and the sample space: *diagram in lecture slide*
