偏倚百分比
以总体过程变异的百分比表示的偏倚：
100 * ( | 平均值偏倚 | / 过程变异)
相关图表工具
常用统计图形在线生成工具：
Pareto Chart
Bar Chart
Box Plot
Histogram
Line Chart
Scatter Plot
Time Series Plot
Function Grapher
Normal Distribution Graph
Normal Probability Plot
实用工具：
Calendar with weeks
Public Holidays by Countries / Regions
Timer & Countdown
Date Calculator
World Clock & Time Zones