Public Function TTestUnEqualVariances( _
   ByVal hypothesizedMeanDifference As Double, _
   ByVal probability As Double, _
   ByVal firstInputSeriesName As String, _
   ByVal secondInputSeriesName As String _
) As TTestResult

Visual Basic (Usage)	Copy Code
Dim instance As Statistics Dim hypothesizedMeanDifference As Double Dim probability As Double Dim firstInputSeriesName As String Dim secondInputSeriesName As String Dim value As TTestResult   value = instance.TTestUnEqualVariances(hypothesizedMeanDifference, probability, firstInputSeriesName, secondInputSeriesName)

public TTestResult TTestUnEqualVariances( 
   double hypothesizedMeanDifference,
   double probability,
   string firstInputSeriesName,
   string secondInputSeriesName
)

Parameters

hypothesizedMeanDifference

The hypothesized difference between the means of the data groups.
Hypothesized Mean Difference

probability

The alpha value (probability that the hypothesis is rejected).
Probability

firstInputSeriesName

The name of the Series object that stores the first group of data. Data must be stored in the first Y-values of the series' data points.
First Input Series Name

secondInputSeriesName

The name of the Series object  that stores the second group of data. Data must be stored in the first Y-values of the series' data points.
Second Input Series Name

Return Value

This method performs a T test for two groups of data, and assumes unequal variances between the two groups (i.e. series).

This analysis tool is referred to as a heteroscedastic t-test, and can be used when the groups under study are distinct. Use a paired test when there is one group before and after a treatment.

If either input series does not exist in the series collection at the time of the method call an exception will be thrown.

The following is a brief description of the TTestResult class members:

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

Reference