This method returns the probability for the T distribution (student's distribution).
Returns the Percentage Points (probability) for the Student t-distribution where a numeric value (x) is a calculated value of t for which the Percentage Points are to be computed. The t-distribution is used in the hypothesis testing of small sample data sets. Use this function in place of a table of critical values for the t-distribution.
Visual Basic (Declaration) | |
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Public Function TDistribution( _ ByVal tValue As Double, _ ByVal degreeOfFreedom As Integer, _ ByVal oneTail As Boolean _ ) As Double |
Visual Basic (Usage) | ![]() |
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Parameters
- tValue
- The T value for which the distribution probability is required.
T value - degreeOfFreedom
- The degree of freedom.
Degree of Freedom - oneTail
- If true the probability is one-tailed, if not it is two-tailed.
Returns the one-tailed distribution
Return Value
Returns T Distribution cumulative functionThe following sample calculates the T distribution probability.
Visual Basic | ![]() |
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Imports Dundas.Charting.WebControl<CRLF>...<CRLF><CRLF>' Calculate T distribution probability for one-tailed distribution<CRLF>Dim result As Double = Chart1.DataManipulator.Statistics.TDistribution(1.96,30,true) |
C# | ![]() |
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using Dundas.Charting.WebControl;<CRLF>...<CRLF><CRLF>// Calculate T distribution probability for one-tailed distribution<CRLF>double result = Chart1.DataManipulator.Statistics.TDistribution(1.96,30,true); |
This method returns the probability for the T distribution, which is otherwise known as the student's distribution.
Use this function in place of a table of critical values for the t-distribution.
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