Ansari-Bradley Test

Performs Ansari-Bradley test on samples.

Super classes

LearnNonparam::PermuTest -> LearnNonparam::TwoSampleTest -> AnsariBradley

Methods

Public methods

• AnsariBradley$new()

Inherited methods

• LearnNonparam::PermuTest$plot()
• LearnNonparam::PermuTest$print()
• LearnNonparam::PermuTest$test()

---

Method new()

Create a new AnsariBradley object.

Usage

AnsariBradley$new(
  type = c("permu", "asymp"),
  alternative = c("two_sided", "less", "greater"),
  n_permu = 10000
)

Arguments

type

a character string specifying the way to calculate the p-value.

alternative

a character string specifying the alternative hypothesis.

n_permu

an integer indicating number of permutations for the permutation distribution. If set to 0, all permutations will be used.

Returns

A AnsariBradley object.

Examples

pmt(
    "twosample.ansari",
    alternative = "greater", n_permu = 0
)$test(Table2.8.1)$print()
#> 
#>  	 Ansari-Bradley Test 
#> 
#> scoring: Ansari-Bradley rank    type: permu(252)    method: default
#> statistic = 13, p-value = 0.2698413
#> alternative hypothesis: true ratio of scales is greater than 1