... n 二项分布的标准差 若以比值或百分数表示，则标准差为: σ p 被称为率的标准误（standard error of rate）， 用来反映随机抽样获得的样本率p与总体π之间 的抽样误差大小。
双语例句
1
Compared to earlier standards, The H. 264 standard has a higher coding efficiency, a wider range of bit rate, better image quality, more network-friendly and anti-error capacity.