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If two variables X and Y are connected b...

If two variables X and Y are connected by the relation 2x+y=3, then e(x,y) is equal to

A

1

B

`-1`

C

`-2`

D

None of these

Text Solution

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The correct Answer is:
B
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FIITJEE-STATISTICS-Assignment Problems (Objective) Level -I
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  2. The variance of first n natural number is:

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  3. The standard deviation of variate xi is σ. Then standard deviation of ...

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  4. S.D. of n observation a(1),a(2),a(3)........a(n) is sigma then the S.D...

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  5. The variance of alpha,beta and gamma is 9, then variance of 5 alpha, 5...

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  6. If e(x,y) is negative, then which of the following is positive?

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  7. Regression equation of yon is 8x-10y+66=0 sigmax=3. Hence cov(x,y) is ...

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  8. If two variables X and Y are connected by the relation 2x+y=3, then e(...

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  9. If the angle between two lines regression is 90^(@), then it represent...

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  10. If A gt 0 and C gt 0," then e" (AX+B, CY+D)=

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  11. If two lines of Regression are respectively y=ax+b and x=alphay+beta. ...

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  12. The coefficient of correlation between X and Y is 0.6 U and V are two ...

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  13. Regression equation of Y on X 2x+3y-12=0. The value of byx is

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  14. If the regression equation of y is y=lambdax+4 and that of X on Y be 4...

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  15. The two lines of regression meet at

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  16. Which of the following is not a measure of dispersion?

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  17. The coefficient of variation is computed by

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  18. If each observation of a raw data, whose variance is sigma^(2), is mul...

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  19. The mean and S.D. of 1,2,3,4,5,6 is

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  20. Let s be the standard deviation of n observations. Each of the n obser...

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