If the regression coeffcients for the variable x and y are `b _(xy) =1 and b _(yx) = 1/2` then find the angle between the regression lines.

If the regression coefficients be given by b_(yx)=(2)/(9) and b_(xy)=2 and theta be angle between the regression lines find the value of theta.

If the regression coefficients b_(xy)=1.6 and b_(yx)=0.4 , and theta is the angle between the two lines of regression, then the value of tantheta is

If the regression coefficients be given b_(yx)=1.6 and b_(xy)=0.4 then find the sum of the slopes of the two regression lines.

If the regrassion coefficient of Y on X is 1.6 that of X on Y is 0.4 , and theta be the angle between two regression lines , find the value of tan theta

If the two coefficients of regression are - 0.6 and – 1.4, find the acute angle between the regression lines.

The angle between the regression lines: x-2y+3=0, 4x-5y+1=0 is

The correlation coefficient between x and y is 0.6. If the variance of x is 225, th variance of y is 400, mean of x is 10 and mean of y is 20, find the equation of two regression lines.

If b_(yx)=0.89 and b_(xy)=0.85 , find r.

The correlation coefficient between x and y is 0.6. If the variance of x is 225 , the variance of y is 400 , mean of x is 10 and mean of y is 20 , find (i) the equations of two regression lines. (ii) the expected value of y when x = 2

Find the angle between the lines x-2y+3=0 and 3x+y-1=0 .