Exam Questions on Basic Statistics

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Exam Questions on Basic Statistics

  1. 1. INTERNATIONAL UNIVERSITY OF BUSINESS AGRICULTURE AND TECHNOLOGY Quiz examination STA 240 Set: Z Full marks: 100 Time: 50 minutes1. Write down the applications of Poisson distribution and properties of normal distribution.2. What is random variable? Explain with an example.3. The number of persons X, in a family chosen at random has the following probability distribution: X 1 2 3 4 5 P(X) 0.1 0.2 m 0.1 0.2 A) Find the value of m. B) Find the average family size E (X). C) Also find V(X).4. p(x)=7x10 ; 1<x<2 A) Find E (X). B) Also find V(X).5. Hospital records show that of patients suffering from a certain disease, 25% die of it. What is the probability that of 10 randomly selected patients, 5 will recover?6. A company makes electric motors. The probability an electric motor is defective is 0.05. What is the probability that a sample of 500 electric motors will contain exactly 10 defective motors?7. Find the following probabilities: (a) P (Z > 1.06) (b) (c) P (1.01 < Z < 2.04)
  2. 2. Md. Mortuza Ahmmed

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