IUBAT–INTERNATIONAL UNIVERSITY OF BUSINESS AGRICULTURE AND TECHNOLOGY                                Midterm examination  ...
A) Find E(X).           (1)        B) Also find V(X).           (2)4.      Explain the concept of lottery method with an e...
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Exam Questions on Basic Statistics

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Exam Questions on Basic Statistics

  1. 1. IUBAT–INTERNATIONAL UNIVERSITY OF BUSINESS AGRICULTURE AND TECHNOLOGY Midterm examination STA 240 Set: X Full marks: 20 Time: 50 minutes1. Let X=fertilizer, Y=production of rice. X Y 1 2 2 5 3 8 a) Find the correlation coefficient, r. (1.5) b) Interpret the result. (1) c) Fit a regression line between X and Y. (2) d) Interpret the results. (2) e) When X=10, what will be the value of Y? (0.5)2. Two coins are tossed, find the probability that two heads areobtained. (1.5)3. f(x)=x5 ; 0<x<1
  2. 2. A) Find E(X). (1) B) Also find V(X). (2)4. Explain the concept of lottery method with an example.(2)5. What is the probability of choosing a day from a month?(1.5) Md. Mortuza Ahmmed

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