If the correlation coefficient between t...

If the correlation coefficient between the random variables X and Y is negative, then `E(XY)gtE(X)E(Y)`

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ML KHANNA-CORRELATION AND REGRESSION -PROBLEM SET (1) (TRUE AND FALSE)

Regression coefficients are independent of change of scale and origin.
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If r is negative both the variables are decreasing.
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Two random variables are such that sigma(X+Y)gtsigma(X-Y), then r (X, ...
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If U=(X-a)/(h) and V=(Y-b)/(k) then b(UV)=b(XY)
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If one of the two regression coefficients is negative, then the variab...
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If r(X, Y)=r, then r(aX,bY) is also equal to r.
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The regression coefficient of y on x is sigma(x)//sigma(y)
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If the correlation coefficient between the random variables X and Y is...
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The product of regression coefficients b(YX).b(XY)gt1
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