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The chapter presents the concept of independence of random variables, which is crucial in probability and statistics, particularly for modeling uncertainty in various systems. It discusses types of random variables, joint distributions, and conditions for independence for both discrete and continuous variables. Key applications of independence in Partial Differential Equations (PDEs) and statistical modeling are also illustrated.
References
unit 3 ch17.pdfClass Notes
Memorization
What we have learnt
Final Test
Revision Tests
Term: Random Variable
Definition: A function that assigns a real number to each outcome in a sample space, categorized as either discrete or continuous.
Term: Joint Distribution
Definition: The probability structure of two or more random variables, described using Joint Probability Mass Function (PMF) for discrete variables and Joint Probability Density Function (PDF) for continuous variables.
Term: Independence of Random Variables
Definition: Two random variables are independent if the occurrence of one does not affect the probability distribution of the other.
Term: Covariance Test
Definition: A statistical method indicating that if the covariance between two variables is zero, they may be uncorrelated but not necessarily independent.
Term: Mutual Information
Definition: A measure that indicates the dependency between two variables; zero mutual information implies independence.