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Write down the correct option: If E(x) =...

Write down the correct option: If E(x) = 3, E{x(x-1)} = 22. Then `var (7 - 2x) is--

A

16

B

64

C

32

D

None of these

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS SET-06-Exercise
  1. Answer the following questions : (Alternatives are to be noted): If T1...

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  2. Answer the following questions : (Alternatives are to be noted): Defin...

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  3. Answer the following questions (Alternatives are to be noted): prove t...

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  4. Answer the following questions (Alternatives are to be noted): Disting...

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  5. Answer the following questions : (Alternatives are to be noted): A Con...

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  6. Answer the following questions : (Alternatives are to be noted): Defin...

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  7. Answer the following questions : (Alternatives are to be noted): Defin...

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  8. Answer the following questions : (Alternatives are to be noted): Deriv...

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  9. Write down the correct option: If Cov (x, y) = 6 then Cov (x, y + 4) =...

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  10. Write down the correct option: Binomial distribution B(n, p) Is positi...

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  11. Write down the correct option: For a poisson distribution with paramet...

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  12. Write down the correct option: If two regression lines coincides r(xy)...

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  13. Write down the correct option: Núll hypothesis is always about-

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  14. Write down the correct option: If E(x) = 3, E{x(x-1)} = 22. Then var (...

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  15. Write down the correct option: sqrt(E(x)^2) ? E(x), Where? is ---

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  16. Write down the correct option: The second order Central monient of a N...

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  17. Answer all questions: The C.V of poisson distribution is 25% fund its ...

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  18. Answer all questions: Which method would you adopt to forecast trend v...

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  19. Answer all questions: State the name of control chart for attribute.

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  20. Answer all questions: Give an example of discrete random variable.

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