Consider a random variable X with the following probability mass function P(X=0)=0.25, P(X=5)=0.5, P(X=12)=0.25. What is...

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Consider a random variable X with the following probability mass function P(X=0)=0.25, P(X=5)=0.5, P(X=12)=0.25. What is...

Consider a random variable X with the following probability mass function P(X=0)=0.25, P(X=5)=0.5, P(X=12)=0.25. What is the expected value (or mean) of X?

math Statistics-And-Probability

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Answer 1

Answer #1

Here $P(X = 0) P(X-5) P(X-12) = 0.25 + 0.5 0.25 1$

So expected value (or mean) of X= $Er.P(X 2) = 0(0.25) 5(0.5) 12(0.25) 5.5$

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Answer 2

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Consider a random variable X with the following probability mass function P(X=0)=0.25, P(X=5)=0.5, P(X=12)=0.25. What is...