六西格玛黑带应该能够计算出一个分组发生频次分布数据的均值和标准偏差。
The Six Sigma Black Belt should be able to compute the mean and standard deviation from a grouped frequency distribution.
结果SDNN值和室早发生频次存在明显的昼夜节奏变化和相关性。
Results The SDNN and the frequency of P. V. C. existed obvious correlatively.
这些缺失大范围人群中的发生频次尚不清楚，但是有估计是在1%左右。
The frequency of these deletions in the population at large is not yet clear, but is believed to be around 1%.
应用推荐