SAMPLE REGRESSION COEFFICIENT OF Y ON X IS COUNTING BY THE FORMULA Select one: (xy-xcdot y)/(sigma _(y)^2) (bar (x)^2cdot bar (y)-bar (x)cdot bar (x)y)/(sigma _(x)^2) (bar (y^2)cdot bar (x)-bar (y)cdot bar (x))/(sigma _(y)^2) D (overline (xy)-overline (x)cdot overline (y))/(sigma _(x)^2) (overline (xy)-overline (x)overline (y))/(sigma _(y)sigma _(x))

The correct answer is:<br /><br />$\frac {\overline {xy}-\overline {x}\overline {y}}{\sigma _{y}\sigma _{x}}$<br /><br />This formula represents the coefficient of correlation between two variables X and Y, which measures the strength and direction of the linear relationship between them. The numerator represents the covariance between X and Y, while the denominator represents the product of the standard deviations of X and Y.