Kruskal Wallis Test Class
Represents the Kruskal-Wallis test.
Definition
Namespace: Numerics.NET.Statistics.Tests
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.4
C#
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.4
public sealed class KruskalWallisTest : MultiSampleTest<double>
- Inheritance
- Object → HypothesisTest → MultiSampleTest<Double> → KruskalWallisTest
Remarks
Use the KruskalWallisTest class to test whether a number of samples come from the same population. This test can be thought of as a non-parametric variation of one-way analysis of variance that doesn't assume the data is normally distributed.
This class approximates the distribution of the test statistic by a beta distribution. This approximation has been found to be more accurate than the traditional chi-square approximation. Still, for small sample sizes, critical values and tail probabilities may differ significantly from their exact values.
Constructors
Kruskal | Constructs a new KruskalWallisTest. |
Kruskal | Constructs a new KruskalWallisTest for the samples in a data frame. |
Kruskal | Constructs a new KruskalWallisTest for the specified Vector<T> array. |
Kruskal | Constructs a new KruskalWallisTest for observations grouped by the specified grouping variable. |
Properties
Chi | Gets the probability that the test statistic would take on the calculated value under the null hypothesis assuming the distribution of the statistic is approximated by a chi-square distribution. |
Correct | Gets or sets whether the Kruskal-Wallis statistic should be corrected for ties. |
Distribution |
Gets the probability distribution used in the hypothesis test.
(Inherited from HypothesisTest) |
Grouping |
Gets the grouping that divides Sample into groups.
(Inherited from MultiSampleTest<T>) |
Hypothesis |
Gets or sets whether the test is one or two-tailed.
(Inherited from HypothesisTest) |
Name |
Gets the name of the hypothesis test.
(Inherited from HypothesisTest) |
PValue |
Gets the probability that the test statistic would take on the calculated value under the alternate hypothesis.
(Inherited from HypothesisTest) |
Sample |
Gets the vector that contains the sample data.
(Inherited from MultiSampleTest<T>) |
Samples |
Gets the collection of samples for the test.
(Inherited from MultiSampleTest<T>) |
Significance |
Gets the significance level used to test the null hypothesis.
(Inherited from HypothesisTest) |
Statistic |
Gets the value of the test statistic.
(Inherited from HypothesisTest) |
Methods
Equals | Determines whether the specified object is equal to the current object. (Inherited from Object) |
Get |
Returns the confidence interval for the test parameter for the default confidence level.
(Inherited from HypothesisTest) |
Get |
Returns the confidence interval for the test parameter for the specified confidence level.
(Inherited from HypothesisTest) |
Get | Returns the number of observations in the specified group. |
Get | Serves as the default hash function. (Inherited from Object) |
Get |
Gets the lower critical value for the hypothesis test's current significance level.
(Inherited from HypothesisTest) |
Get |
Gets the lower critical value for the hypothesis test at the specified significance level.
(Inherited from HypothesisTest) |
Get | Returns the mean of the ranks of the observations from the specified group. |
Get |
Gets the probability that the test statistic would take on the calculated value under the specified alternate hypothesis.
(Inherited from HypothesisTest) |
Get | Returns the sum of the ranks of the observations from the specified group. |
Get | Gets the Type of the current instance. (Inherited from Object) |
Get |
Gets the upper critical value for the test statistic at the hypothesis test's current significance level.
(Inherited from HypothesisTest) |
Get |
Gets the upper critical value for the test statistic at the specified significance level.
(Inherited from HypothesisTest) |
Reject() |
Returns whether the null hypothesis is rejected
using the default significance level.
(Inherited from HypothesisTest) |
Reject( |
Returns whether the null hypothesis is rejected using the specified significance level.
(Inherited from HypothesisTest) |
Summarize() |
Returns a string containing a human-readable summary of the object.
(Inherited from HypothesisTest) |
Summarize( |
Returns a string containing a human-readable summary of the object
using the specified options.
(Inherited from HypothesisTest) |
ToString | Returns a string that represents the current object. (Inherited from HypothesisTest) |