Exam Questions on Basic Statistics

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Exam Questions on Basic Statistics

  1. 1. Quiz # 7 (D)1. Write down the applications of Poisson distribution and properties of normal distribution.2. The number of persons X, in a family chosen at random has the following probability distribution: X 1 2 3 4 5 6 P(X) 1/6 1/6 1/6 1/6 1/6 1/6 A) Find the average family size E (X ). B) Also find V(X).3. f(x)=x ; 0<x<1 A) Find E (X ). B) Also find V(X).4. Hospital records show that of patients suffering from a certain disease, 75% die of it. What is the probability that of 6 randomly selected patients, 4 will recover?5. A company makes electric motors. The probability an electric motor is defective is 0.01. What is the probability that a sample of 300 electric motors will contain exactly 5 defective motors?6. Find the following probabilities: (a) P (Z > 1.06) (b) (c) P (1.06 < Z < 2.14)
  2. 2. Md. Mortuza Ahmmed

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