Binomial Random Variable Properties Quiz
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Questions and Answers

What is the variance V(T) of the random variable T?

  • $V(T) = p^2(1-p)$
  • $V(T) = p(1-p)$ (correct)
  • $V(T) = np(1-p)$
  • $V(T) = n(1-p)^2$

    • What is the expectation E(T) of the random variable T?

  • $E(T) = n(1-p)$
  • $E(T) = p$ (correct)
  • $E(T) = 1-p$
  • $E(T) = np$

    • What is the probability mass function P(X=1) for the Binomial random variable X?

  • $P(X=1) = np(1-p)$
  • $P(X=1) = p^2(1-p)$
  • $P(X=1) = p(1-p)$ (correct)
  • $P(X=1) = n(1-p)^2$

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