DataManipulator.Statistics对像实现计算平均值，中位数，方差，标准偏差

Imports System.Windows.Forms.DataVisualization.Charting
...

' Calculate Mean(平均值)
Dim mean As Double = chart1.DataManipulator.Statistics.Mean("Series1")

' Calculate Median(中位数)
Dim median As Double = chart1.DataManipulator.Statistics.Median("Series1")

' Calculate Standard Deviation from the Variance(方差和标准偏差)
'均方差(标准偏差)其实就是方差的正值平方根
Dim variance As Double = chart1.DataManipulator.Statistics.Variance("Series1", True)
Dim standardDeviation As Double = Math.Sqrt(variance)
... 

协方差 （协变值）
Dim p1 As Double = xChart.DataManipulator.Statistics.Covariance("Series1", True)