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Two random variables have the least squa...

Two random variables have the least squares regression lines `3x+2y-26=0 and 6x+y-31=0` correlation coefficient `r_(xy)` is

A

`-0.5`

B

`(1)/(2)`

C

`(1)/(4)`

D

none of these

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The correct Answer is:
A
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ML KHANNA-CORRELATION AND REGRESSION -PROBLEM SET (1) (MCQ)
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  2. In two sets of variables x and y with 50 observations each, the follow...

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  3. Two random variables have the least squares regression lines 3x+2y-26=...

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  4. The lines of regression of y on x and x on y are respectively y=x and ...

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  5. The regression lines of x on y and y on x are x=4y+5 and y=kx+4 respec...

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  6. For two variables x and y, the two regression lines are x+2y-5=0, 2x+3...

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  7. For 10 observations on price (x) and supply (y) the following data wer...

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

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  9. r(xy)lt0, according as

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  10. The correlation between two variables x and y is given to be r. The va...

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  11. If U=aX+b, and V=-cY+d where a and c positive. If r(U,V)=0.6, then r(X...

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  12. Let X and Y be two variables with the same variance and let U=X+Y,V=X-...

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  13. If Z=aX+bY and r is the correlation coefficient between X and Y, then ...

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  14. If X and Y are two independent variables with sigma(X)^(2)=36,sigma(Y)...

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  15. The coefficient of correlation is independent of

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  16. If both the regression coefficients b(YX) and b(XY) are positive, then

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  17. If the slopes of the line of regression of Y and X and of X and Y are ...

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  18. If the two lines of regression are 3x+y=15 and x+4y=3, then value of x...

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  19. The coefficient of correlation between random variables X and Y is 0.2...

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  20. Linear relation between the variables is given by the equation ax+by+c...

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