The Sample Covariance Can Be Calculated in Any of the Following

Multiple Choice

The sample covariance can be calculated in any of the following ways, with the exception of:

A) $\frac { 1 } { n - 1 } \sum _ { i = 1 } ^ { n } \left( X _ { i } - \bar { X } \right) \left( Y _ { i } - \bar { Y } \right)$
B) $\frac { 1 } { n - 1 } \sum _ { i = 1 } ^ { n } X _ { i } Y _ { i } - \frac { n } { n - 1 } \overline { X Y }$
C) $\frac { 1 } { n } \sum _ { i = 1 } ^ { n } \left( X _ { i } - \mu _ { X } \right) \left( Y _ { i } - \mu _ { Y } \right)$
D) r_XYS_YS_Y, where r_XY is the correlation coefficient.