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Find out the correct answer out of the options given against each questions : If `E (x) = 4`, `var (x) = 9`, then `E(x^2)` equals to

A

5

B

7

C

25

D

none of these.

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UNITED BOOK HOUSE-HIGHER SECONDARY EXAMINATION 2015-Exercise
  1. Find out the correct answer out of the options given against each ques...

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  2. Find out the correct answer out of the options given against each ques...

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  3. Find out the correct answer out of the options given against each ques...

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  4. Find out the correct answer out of the options given against each ques...

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  5. Find out the correct answer out of the options given against each ques...

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  6. Find the probability that the birth days of six different persons will...

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  7. Answer the following questions: In testing of hypothesis define power.

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  8. Answer the following questions: Give an example of upward trend of tim...

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  9. Answer the following questions: Name the four components of time serie...

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  10. Answer the following questions: What do you mean by process control?

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  11. Answer the following questions: If X is a discrete random variable, th...

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  12. Answer the following questions:State the condition under which the bin...

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  13. Answer the following questions: Which distribution has its mean equal ...

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  14. Answer the following questions: Mention some main factors behind seaso...

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  15. Answer the following questions in short: If the correlation coefficie...

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  16. Answer the following questions in short: If the correlation coefficie...

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  17. Answer the following questions in short: If X follows a symmetric bino...

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  18. Answer the following questions in short: Find the maximum value of the...

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  19. Answer the following questions in short: Show that points of inflexion...

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  20. Answer the following questions in short: State under what conditions p...

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