If the regression coefficient of Y on X is `-6`, and the correlation coefficient between X and Y `-(1)/(2),` then the regression coefficient of X on Y would be

if the regression coefficient of Y on X is4/3,then the regression coefficient of X and Y :

Are the following statement correct? Given the reasons: (a) The regression coefficient of X and Y is 3.2 and that of y on x is 0.8. (b) The regression coefficient of X and Y is -2.5 and the correlation coefficient is 0.3.

If the two regression coefficients are - 0.4 and -1.6, then the coefficient of correlations is

If two lines of regression are perpendicular, then the correlation coefficient r is