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

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.

The coefficient of correlation between the values denoted by X and Y is 0.5 . The mean of X is 3 and that of Y is 5. Their standard deviations are 5 and 4 respectively. Find (i) the two lines of regression. (ii) the expected value of Y, when X is given 14 (iii) the expected value of when Y is given 9

The mean of 5 observations 1,2,6,x and y is 4.4 and their variance is 8.24 , then x+y is

If byx=-(1)/(4) , mean of x = 3 and mean of y = 3, then regression equation y on x is

If coefficient of correlation is -0.6, standard deviation of x is 5 and variance of y is 16, then what is the co-variance of x and y?

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

The regression equation of x on y is 9x-2y-38=0 . If mean of x series is 6, then mean of y series is

The coefficient of correlation between the values denoted by x and y is 0.5. The standard deviation of x is 5 and that of y is 4. Find the angle between the lnes of regression.

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

If the regression equation of y x is given by x+ y =8 , then estimate the value of y when x is 3.5 .