variance of proportion

• 比例的方差

variance of proportion的用法和样例：

例句

1. A strong square jaw is a sign of firm character.
   强健的方颚是性格坚定的象征。
2. That is, the variance of the monthly return is one-twelfth of the annual variance.
   就是说，月度回报的方差是年度方差的十二分之一。