Expectation — Topic Summaries
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Probability Theory 16 | Variance
Variance turns “how far from the mean” into a precise number. After expectation identifies the average location a random variable fluctuates around,...
Probability Theory 14 | Expectation and Change-of-Variables [dark version]
Expectation turns a random variable into a single number: the average value it fluctuates around. For a random variable X, the expectation E[X] is...
Probability Theory 16 | Variance [dark version]
Variance turns “how much a random variable fluctuates around its mean” into a precise number. After defining expectation as the average value a...