Transcript Lecture 12

ASEN 5070: Statistical Orbit Determination I
Fall 2015
Professor Brandon A. Jones
Lecture 12: Probability and Statistics (Part 2)
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Lecture Quiz Due 5pm on Friday
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Homework 4 Due Friday
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PDF Moments
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Probability of X in [x,x+dx]:
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where f(x) is the probability density function (PDF)
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For CRVs, the probability axioms imply:
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The expected value is a weighted average of all
possible values to determine the mean
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Define the k-th moment about the origin as
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We define the k-th moment about the mean:
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The second moment about the mean is also
known as the variance:
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Although not traditionally examined, higher-order
moments are becoming increasingly important in
orbit determination…
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If a and b are constants (or equivalently
independent of X ), then
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Example Distributions
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Images: Wikicommons
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PDF
CDF
Images: Wikicommons
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Images: Wikicommons
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Example Problems
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