TwoSampleTTest Constructor

This constructor constructs a 'blank' two sample t test. The test is an unpaired test for equality of the means with a significance level of 0.95. The samples have to be set using the Sample1 and Sample1 properties before any of the test results are accessed.

public TwoSampleTTest(
	Vector<double> sample1,
	Vector<double> sample2
)

Public Sub New ( 
	sample1 As Vector(Of Double),
	sample2 As Vector(Of Double)
)

public:
TwoSampleTTest(
	Vector<double>^ sample1, 
	Vector<double>^ sample2
)

new : 
        sample1 : Vector<float> * 
        sample2 : Vector<float> -> TwoSampleTTest

Parameters

sample1  Vector<Double>

The first vector

sample2  Vector<Double>

The second vector

This constructor constructs a t test for the assumption that the population means of two samples are equal. The test is unpaired, meaning that the samples are from two independent populations. No assumptions are made about the variances of the two populations.

public TwoSampleTTest(
	Vector<double> sample1,
	Vector<double> sample2,
	double difference
)

Public Sub New ( 
	sample1 As Vector(Of Double),
	sample2 As Vector(Of Double),
	difference As Double
)

public:
TwoSampleTTest(
	Vector<double>^ sample1, 
	Vector<double>^ sample2, 
	double difference
)

new : 
        sample1 : Vector<float> * 
        sample2 : Vector<float> * 
        difference : float -> TwoSampleTTest

Parameters

sample1  Vector<Double>

The first vector

sample2  Vector<Double>

The second vector

difference  Double

The difference between the means to test for.

This constructor constructs a t test for the assumption that the difference between the population means of two samples is equal to difference. The test is unpaired, meaning that the samples are from two independent populations. No assumptions are made about the variances of the two populations.

public TwoSampleTTest(
	Vector<double> sample1,
	Vector<double> sample2,
	SamplePairing pairing,
	bool assumeEqualVariances
)

Public Sub New ( 
	sample1 As Vector(Of Double),
	sample2 As Vector(Of Double),
	pairing As SamplePairing,
	assumeEqualVariances As Boolean
)

public:
TwoSampleTTest(
	Vector<double>^ sample1, 
	Vector<double>^ sample2, 
	SamplePairing pairing, 
	bool assumeEqualVariances
)

new : 
        sample1 : Vector<float> * 
        sample2 : Vector<float> * 
        pairing : SamplePairing * 
        assumeEqualVariances : bool -> TwoSampleTTest

Parameters

sample1  Vector<Double>

The first vector

sample2  Vector<Double>

The second vector

pairing  SamplePairing

A SamplePairing value that specifies whether the test is paired or unpaired.

assumeEqualVariances  Boolean

Indicates whehter the variances of the two populations are assumed to be equal.

This constructor constructs a t test for the assumption that the population means of two samples are equal. The pairing parameter specifies whether the test is paired or unpaired. The assumeEqualVariances indicates whether or not the variances of the two populations are assumed to be equal.

public TwoSampleTTest(
	Vector<double> sample1,
	Vector<double> sample2,
	double difference,
	SamplePairing pairing,
	bool assumeEqualVariances = true,
	HypothesisType type = HypothesisType.TwoTailed
)

Public Sub New ( 
	sample1 As Vector(Of Double),
	sample2 As Vector(Of Double),
	difference As Double,
	pairing As SamplePairing,
	Optional assumeEqualVariances As Boolean = true,
	Optional type As HypothesisType = HypothesisType.TwoTailed
)

public:
TwoSampleTTest(
	Vector<double>^ sample1, 
	Vector<double>^ sample2, 
	double difference, 
	SamplePairing pairing, 
	bool assumeEqualVariances = true, 
	HypothesisType type = HypothesisType::TwoTailed
)

new : 
        sample1 : Vector<float> * 
        sample2 : Vector<float> * 
        difference : float * 
        pairing : SamplePairing * 
        ?assumeEqualVariances : bool * 
        ?type : HypothesisType 
(* Defaults:
        let _assumeEqualVariances = defaultArg assumeEqualVariances true
        let _type = defaultArg type HypothesisType.TwoTailed
*)
-> TwoSampleTTest

Parameters

sample1  Vector<Double>

The first vector

sample2  Vector<Double>

The second vector

difference  Double

The difference between the means to test for.

pairing  SamplePairing

A SamplePairing value that specifies whether the test is paired or unpaired.

assumeEqualVariances  Boolean  (Optional)

Indicates whehter the variances of the two populations are assumed to be equal.

type  HypothesisType  (Optional)

A HypothesisType value that indicates whether the test is upper or lower one-tailed or two-tailed.

This constructor constructs a t test for the assumption that the difference between the population means of two samples is equal to difference. The pairing parameter specifies whether the test is paired or unpaired. The assumeEqualVariances indicates whether or not the variances of the two populations are assumed to be equal.

public TwoSampleTTest(
	int count1,
	double mean1,
	double variance1,
	int count2,
	double mean2,
	double variance2,
	double difference = 0,
	SamplePairing pairing = SamplePairing.Unpaired,
	bool assumeEqualVariances = true,
	HypothesisType type = HypothesisType.TwoTailed
)

Public Sub New ( 
	count1 As Integer,
	mean1 As Double,
	variance1 As Double,
	count2 As Integer,
	mean2 As Double,
	variance2 As Double,
	Optional difference As Double = 0,
	Optional pairing As SamplePairing = SamplePairing.Unpaired,
	Optional assumeEqualVariances As Boolean = true,
	Optional type As HypothesisType = HypothesisType.TwoTailed
)

public:
TwoSampleTTest(
	int count1, 
	double mean1, 
	double variance1, 
	int count2, 
	double mean2, 
	double variance2, 
	double difference = 0, 
	SamplePairing pairing = SamplePairing::Unpaired, 
	bool assumeEqualVariances = true, 
	HypothesisType type = HypothesisType::TwoTailed
)

new : 
        count1 : int * 
        mean1 : float * 
        variance1 : float * 
        count2 : int * 
        mean2 : float * 
        variance2 : float * 
        ?difference : float * 
        ?pairing : SamplePairing * 
        ?assumeEqualVariances : bool * 
        ?type : HypothesisType 
(* Defaults:
        let _difference = defaultArg difference 0
        let _pairing = defaultArg pairing SamplePairing.Unpaired
        let _assumeEqualVariances = defaultArg assumeEqualVariances true
        let _type = defaultArg type HypothesisType.TwoTailed
*)
-> TwoSampleTTest

Parameters

count1  Int32

The number of observations in the first sample.

mean1  Double

The mean of the first sample.

variance1  Double

The variance of the first sample.

count2  Int32

The number of observations in the second sample.

mean2  Double

The mean of the second sample.

variance2  Double

The variance of the second sample.

difference  Double  (Optional)

The proposed difference between the means.

pairing  SamplePairing  (Optional)

A SamplePairing value that specifies whether the test is paired or unpaired.

assumeEqualVariances  Boolean  (Optional)

Indicates whehter the variances of the two populations are assumed to be equal.

type  HypothesisType  (Optional)

A HypothesisType value that indicates whether the test is upper or lower one-tailed or two-tailed.

Reference