Statistical Sciences 2141A/B Lecture 4: Section 1.1
16 Oct 2018
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Document Summary
Probability refers to the study of randomness and uncertainty. A probability is a number b/w 0 and 1 (or 0% and 100%) which informs us in advance as to how likely it is that something will happen when there are a number of possible outcomes. When we say that something is "certain" to happen, it means that it"s probability is 1. When we say that something is "impossible", we understand that it"s probability of occurrence is 0. When something is more likely to happen than not, then we say it is "probable", and the associated probability would be greater than 0. 5. If the chance of something happening is positive but small, we either say "it"s a possibility" or "it is improbable" A random experiment is any activity or process whose outcome is subject to uncertainty (i. e more than one outcome is possible)
