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Probability and Statistics


Special Expectations

Now we are going to look at some important numerical measures associated with probability distribution of random variable.

Given a random variable XX, along with its distribution, it would be extremely useful if we are able to summarize the essential properties of distribution by suitably defined measures. One such measure is E(X)E(X)


The mean value of random variable XX is denoted by μ\mu and defined to be μ=E(X)\mu=E(X) provided it exists.