'Trial isucceeds' diaporamas de présentation

4. Random variables part two

4. Random variables part two. Review. A discrete random variable X assigns a discrete value to every outcome in the sample space. E [ N ]. Probability mass function of X : p ( x ) = P ( X = x ). Expected value of X : E [ X ] = ? x x p ( x ). N: number of heads in two coin flips.

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