The Standard Deviation Can Be Defined as
A) $\sqrt { \Sigma ( D - \bar { D } ) ^ { 2 } P }$

The standard deviation can be defined as

A) $\sqrt { \Sigma ( D - \bar { D } ) ^ { 2 } P }$
B) $\sqrt { \Sigma ( D - \bar { D } ) P }$
C) $\sqrt { ( D - \bar { D } ) P }$
D) $\sqrt { ( \bar { D } - D ) P }$