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MCQs

Random Variable And Probability Distributions

Total Questions : 83 | Page 9 of 9 pages
Question 81. The formula of calculating the expected value of random variable x of gamma distribution is as
  1.    E(x) = n ⁄ μ
  2.    E(x) = pq ⁄ μ
  3.    E(x) = μ ⁄ np
  4.    E(x) = α ⁄ μ
 Discuss Question
Answer: Option A. -> E(x) = n ⁄ μ
Answer: (a).E(x) = n ⁄ μ
Question 82. The standard normal probability distribution has mean equal to 40, whereas the value of random variable x is 80 and the z-statistic is equal to 1.8 then the standard deviation of standard normal probability distribution is
  1.    120
  2.    80
  3.    40
  4.    20
 Discuss Question
Answer: Option D. -> 20
Answer: (d).20
Question 83. If the value of λ is 9 and value of random variable x is 5 then the value of z-score is
  1.    −2.58
  2.    −1.86
  3.    −2.34
  4.    −1.34
 Discuss Question
Answer: Option D. -> −1.34
Answer: (d).−1.34

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