If the two lines of regression are `4x-5y+33=0and20x-9y-107=0`, find the variance of y when `sigma_(x)=3`.

If the two lines of regression are 3x - 2y+1 = 0 and 2x -y-2=0 , then bar x+bary is equal to:

The two lines of of regressions are x+2y-5=0 and 2x+3y-8=0 and the variance of x is 12. Find the variance of y and the coefficient of correlation.

The two lines of regression are x+ 2y- 5= 0 and 2x + 3y - 8=0 and the variance of x is 12. Find the variance of y and the coefficient of correlation.

For the lines of regression 4x-2y=4and2x-3y+6=0 , find the mean of 'x' and the mean of 'y'.

If the two lines of regression are 2x-y-4=0 and 9x-2y-38=0 , then the means of x and y variates respectively are

If two lines of regression are 4x + 2y - 3=0 and 3x + 6y + 5 = 0 , then find the correlation coefficient.

If the line of regression of x on y is 3x + 2y - 5 = 0 , then the value of b_(xy) is

If the line of regression on x on y is 40x - 18y = 214 , then estimate the value of x when y=3

The two lines of regressions are 4x + 2y - 3 =0 and 3x + 6y +5 =0 . Find the correlation coefficient between x and y .

If the two regression lines of bivariate distribution are 4x - 5y + 33 =0 and 20x - 9y - 107 =0 . (ii) estimate the value of x when y = 7 .