# Class TTestResult

The result of statistical T test is stored in this class. If the T value is closer to 0.0 than TCriticalValueTwoTail or even TCriticalValueOneTail, then we can't deduce that D(hypothesized difference) is not good mean value difference. In other case ( TCriticalValueTwoTail is closer to 0.0 than TValue), there is a huge probability that hypothesized difference D hadn't been chosen correctly.

##### Inheritance

##### Inherited Members

**Namespace**: Syncfusion.Windows.Forms.Chart.Statistics

**Assembly**: Syncfusion.Chart.Base.dll

##### Syntax

`public class TTestResult`

### Constructors

#### TTestResult()

Initializes a new instance of the TTestResult class.

##### Declaration

`public TTestResult()`

### Properties

#### DegreeOfFreedom

Gets number of degrees of freedom of T variable student's distribution.

##### Declaration

`public double DegreeOfFreedom { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The degree of freedom. |

#### FirstSeriesMean

Gets first series mean value. Series represents sample from studied population.

##### Declaration

`public double FirstSeriesMean { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The first series mean. |

#### FirstSeriesVariance

Gets first series variance. Series represents sample from studied population.

##### Declaration

`public double FirstSeriesVariance { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The first series variance. |

#### ProbabilityTOneTail

Gets the probability that the random variable has values at the tail, assuming that null hypothesis is true.

##### Declaration

`public double ProbabilityTOneTail { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The probability T one tail. |

#### ProbabilityTTwoTail

Gets the probability that the random variable has values at the tails, assuming that null hypothesis is true.

##### Declaration

`public double ProbabilityTTwoTail { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The probability T two tail. |

#### SecondSeriesMean

Gets second series mean value. Series represents sample from studied population.

##### Declaration

`public double SecondSeriesMean { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The second series mean. |

#### SecondSeriesVariance

Gets second series variance. Series represents sample from studied population.

##### Declaration

`public double SecondSeriesVariance { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The second series variance. |

#### TCriticalValueOneTail

Gets critical value of T which corresponds to Alpha probability. The area under normal probability density curve of tail is equal to alpha probability.

##### Declaration

`public double TCriticalValueOneTail { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The T critical value one tail. |

#### TCriticalValueTwoTail

Gets critical value of T which corresponds to Alpha probability. The area under normal probability density curve of two symmetrical tails is equal to alpha probability.

##### Declaration

`public double TCriticalValueTwoTail { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The T critical value two tail. |

#### TValue

Gets calculated T value. ( Value of normally distributed random variable with mean=0, and variance=1 ).

##### Declaration

`public double TValue { get; }`

##### Property Value

Type | Description |
---|---|

System.Double | The T value. |