README

The goal of the package is to put into practice the modular and logarithmic minimum tests for independence in two-way, three-way and four-way contingency tables. Statistic value, cv value and p-value are calculated. This package also includes three table generation functions and six data sets. To read more about the package please see (and cite :)) papers:

Sulewski, P. (2016). Moc testów niezależności w tablicy dwudzielczej większej niż 2×2. Przegląd statystyczny 63(2), 190-210.

Sulewski, P. (2019). The LMS for Testing Independence in Two-way Contingency Tables. Biometrical Letters 56(1), 17-43.

Sulewski, P. (2018). Power Analysis Of Independence Testing for the Three-Way Con-tingency Tables of Small Sizes. Journal of Applied Statistics 45(13), 2481-2498.

Sulewski, P. (2021). Logarithmic Minimum Test for Independence in Three Way Con-tingency Table of Small Sizes. Journal of Statistical Computation and Simulation 91(13), 2780-2799.

Installation

install.packages("PSIndependenceTest")

You can install the development version of PSIndependenceTest from GitHub with:

library("remotes")
remotes::install_github("PiotrSule/PSIndependenceTest")

The first one, table1, consist of 40 observations presented as two-way contingency table 2 x 2. See details: Sulewski, P. (2017). A new test for independence in 2x2 contingency tables. Acta Universitatis Lodziensis. Folia Oeconomica 4(330), 55–75.

The second one, table2, consist of 25 observations described the effect of a treatment for rheumatoid arthritis vs. a placebo presented as two-way contingency table 2 x 3. See details: Sulewski, P. (2019). The LMS for Testing Independence in Two-way Contingency Tables. Biometrical Letters 56 (1), 17-43.

The third one, table3, consist of 695 observations described the frequency of watching videos at home or at friends’ homes for young people between 7 and 15 years of age, cross-classified according to age and sex. Data are presented as three-way contingency table 3 x 3 x 2. See details: Sulewski, P. (2021). Logarithmic Minimum Test for Independence in Three Way Contingency Table of Small Sizes. Journal of Statistical Computation and Simulation 91(13), 2780-2799

The fourth one, table4, consist of 100 observations obtained using the Monte Carlo method when Ho is true, i.e. all probabilities pijt equal 1/24. Data is presented as three-way contingency table 2 x 3 x 4.

The fifth one, table5,provides information on the fate of passengers on the fatal maiden voyage of the ocean liner ‘Titanic’, summarized according to economic status (class), sex, age and survival. Data is presented as four-way contingency table 4 x 2 x 2 x 2. The sample size equals 2201.

The sixth one, table6, consist of 100 observations obtained using the Monte Carlo method when Ho is true, i.e. all probabilities pijtu equal 1/16. Data is presented as four-way contingency table 2 x 2 x 2 x 2.

library(PSIndependenceTest)
dim(table1)
#> [1] 2 2
length(table2)
#> [1] 6

Functions

This function generating the two-way contingency table with the Monte Carlo method

GenTab2(matrix(1/8, nrow = 2, ncol = 4), 50)
#>      [,1] [,2] [,3] [,4]
#> [1,]    5    4    5    5
#> [2,]    6    6    8   11
GenTab2(matrix(1/12, nrow = 4, ncol = 3), 60)
#>      [,1] [,2] [,3]
#> [1,]    6    8    7
#> [2,]    1    2    5
#> [3,]    4    9    3
#> [4,]    3    5    7

This function returns the statistic value of the modular independence test in the two-way contingency table.

Mod2.stat(table1)
#> [1] 1.273572
Mod2.stat(GenTab2(matrix(1/9, nrow = 3, ncol = 3), 90))
#> [1] 1.149439

This function returns the critical value of the modular independence test in the two-way contingency table.

Mod2.cv(2, 2, 40, 0.05, B = 1e3) 
#> [1] 1.265177
Mod2.cv(2, 3, 60, 0.1) 
#> [1] 1.542129

This function returns the p-value of the modular independence test in the two-way contingency table.

Mod2.pvalue(Mod2.stat(table1), 2, 2, 40, B = 1e3)
#> [1] 0.04695305
Mod2.pvalue(Mod2.stat(table2), 2, 3, 60)
#> [1] 0.6931307

This function returns the test statistic and p-value of the logarithmic minimum independence test in the two-way contingency table.

Mod2.test(table1, B = 1e3)
#> 
#>  Modular test for independence in two-way contingency table
#> 
#> data:  table1
#> D = 1.2736, p-value = 0.0488
Mod2.test(table2)
#> 
#>  Modular test for independence in two-way contingency table
#> 
#> data:  table2
#> D = 0.61103, p-value = 0.7001

This function returns the statistic value of the logarithmic minimum independence test in the two-way contingency table.

Lms2.stat(table1)
#> [1] 1.660665
Lms2.stat(GenTab2(matrix(1/9, nrow = 3, ncol = 3), 90))
#> [1] 1.759932

This function returns the critical value of the logarithmic minimum independence test in the two-way contingency table.

Lms2.cv(2, 2, 40, 0.05, B = 1e3) 
#> [1] 1.34987
Lms2.cv(2, 3, 60, 0.1)  
#> [1] 1.605235

This function returns the p-value of the logarithmic minimum independence test in the two-way contingency table.

Lms2.pvalue(Lms2.stat(table1), 2, 2, 40, B = 1e3)
#> [1] 0.008991009
Lms2.pvalue(Lms2.stat(table2), 2, 3, 60)
#> [1] 0.7009299

This function returns the test statistic and p-value of the logarithmic minimum independence test in the two-way contingency table.

Lms2.test(table1, B = 1e3)
#> 
#>  Modular test for independence in two-way contingency table
#> 
#> data:  table1
#> D = 1.6607, p-value = 0.0176
Lms2.test(table2)
#> 
#>  Modular test for independence in two-way contingency table
#> 
#> data:  table2
#> D = 0.61437, p-value = 0.7059

This function generating the three-way contingency table with the Monte Carlo method

GenTab3(array(1/12, dim=c(2,2,3)), 60)
#> , , 1
#> 
#>      [,1] [,2]
#> [1,]    5    7
#> [2,]    5    5
#> 
#> , , 2
#> 
#>      [,1] [,2]
#> [1,]    8    5
#> [2,]    6    5
#> 
#> , , 3
#> 
#>      [,1] [,2]
#> [1,]    5    4
#> [2,]    0    5
GenTab3(array(1/18, dim=c(2,3,3)), 80)
#> , , 1
#> 
#>      [,1] [,2] [,3]
#> [1,]    5    8    0
#> [2,]    4    5    6
#> 
#> , , 2
#> 
#>      [,1] [,2] [,3]
#> [1,]    3    3    6
#> [2,]    5    2    4
#> 
#> , , 3
#> 
#>      [,1] [,2] [,3]
#> [1,]   10    3    6
#> [2,]    5    3    2

This function returns the statistic value of the modular independence test in the three-way contingency table.

Mod3.stat(table3)
#> [1] 2.641208
Mod3.stat(GenTab3(array(1/12, dim=c(2,2,3)), 120))
#> [1] 1.890008

This function returns the critical value of the modular independence test in the three-way contingency table.

Mod3.cv(2, 2, 2, 80, 0.05, B = 1e3) 
#> [1] 2.380025
Mod3.cv(2, 2, 2, 80, 0.1) 
#> [1] 2.181818

This function returns the p-value of the modular independence test in the three-way contingency table.

Mod3.pvalue(Mod3.stat(table4), 2, 2, 2, 80, B = 1e3)
#> [1] 0.02397602
Mod3.pvalue(Mod3.stat(table4), 2, 2, 2, 80)
#> [1] 0.02409759

This function returns the test statistic and p-value of the modular independence test in the three-way contingency table.

Mod3.test(table4, B = 1e2)
#> 
#>  Modular test for independence in three-way contingency table
#> 
#> data:  table4
#> D = 2.5886, p-value = 0.0265
Mod3.test(table4, B = 1e3)
#> 
#>  Modular test for independence in three-way contingency table
#> 
#> data:  table4
#> D = 2.5886, p-value = 0.0283

This function returns the statistic value of the logarithmic minimum independence test in the three-way contingency table.

Lms3.stat(table3)
#> [1] 2.712789
Lms3.stat(GenTab3(array(1/12, dim=c(2,2,3)), 120))
#> [1] 3.960989

This function returns the critical value of the logarithmic minimum independence test in the three-way contingency table.

Lms3.cv(2, 2, 2, 80, 0.05, B = 1e2) 
#> [1] 2.775388
Lms3.cv(2, 2, 2, 80, 0.1, B = 1e3) 
#> [1] 2.313046

This function returns the p-value of the logarithmic minimum independence test in the three-way contingency table.

Lms3.pvalue(Lms3.stat(table4), 2, 2, 2, 80, B = 1e3)
#> [1] 0.04095904
Lms3.pvalue(Lms3.stat(table4), 2, 2, 2, 80)
#> [1] 0.04019598

This function returns the test statistic and p-value of the logarithmic minimum independence test in the three-way contingency table.

Lms3.test(table4, B = 1e2)
#> 
#>  Logarithmic minimum test for independence in three-way contingency
#>  table
#> 
#> data:  table4
#> D = 2.6637, p-value = 0.04
Lms3.test(table4, B = 1e3)
#> 
#>  Logarithmic minimum test for independence in three-way contingency
#>  table
#> 
#> data:  table4
#> D = 2.6637, p-value = 0.0371

This function generating the four-way contingency table with the Monte Carlo method.

GenTab4(array(1/16, dim=c(2,2,2,2)), 100)
#> , , 1, 1
#> 
#>      [,1] [,2]
#> [1,]    7    7
#> [2,]    9    9
#> 
#> , , 2, 1
#> 
#>      [,1] [,2]
#> [1,]   10    8
#> [2,]    5    4
#> 
#> , , 1, 2
#> 
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    5    5
#> 
#> , , 2, 2
#> 
#>      [,1] [,2]
#> [1,]    1   11
#> [2,]    5   10
GenTab4(array(1/36, dim=c(2,3,2,3)), 150)
#> , , 1, 1
#> 
#>      [,1] [,2] [,3]
#> [1,]    2    3    4
#> [2,]    5    4    4
#> 
#> , , 2, 1
#> 
#>      [,1] [,2] [,3]
#> [1,]    5    7    6
#> [2,]    9    3    6
#> 
#> , , 1, 2
#> 
#>      [,1] [,2] [,3]
#> [1,]    1    4    5
#> [2,]    2    5    2
#> 
#> , , 2, 2
#> 
#>      [,1] [,2] [,3]
#> [1,]    7    6    4
#> [2,]    4    7    1
#> 
#> , , 1, 3
#> 
#>      [,1] [,2] [,3]
#> [1,]    6    1    2
#> [2,]    5    1    4
#> 
#> , , 2, 3
#> 
#>      [,1] [,2] [,3]
#> [1,]    7    5    3
#> [2,]    3    4    3

This function returns the statistic value of the modular independence test in the four-way contingency table.

Mod4.stat(table5)
#> [1] 46.70092
Mod4.stat(table6)
#> [1] 3.7301

This function returns the critical value of the modular independence test in the four-way contingency table.

Mod4.cv(2, 2, 2, 2, 160, 0.05, B = 1e2)
#> [1] 4.395262
Mod4.cv(2, 2, 2, 2, 160, 0.1, B = 1e3)
#> [1] 4.425875

This function returns the p-value of the modular independence test in the four-way contingency table.

Mod4.pvalue(Mod4.stat(table6), 2, 2, 2, 2, 160, B = 1e2)
#> [1] 0.3168317
Mod4.pvalue(Mod4.stat(table6), 2, 2, 2, 2, 160, B = 1e3)
#> [1] 0.3426573

This function returns the test statistic and p-value of the modular independence test in the -way contingency table.

Mod4.test(table6, B = 1e2)
#> 
#>  Modular test for independence in four-way contingency table
#> 
#> data:  table6
#> D = 3.7301, p-value = 0.3101
Mod4.test(table6, B = 1e3)
#> 
#>  Modular test for independence in four-way contingency table
#> 
#> data:  table6
#> D = 3.7301, p-value = 0.3111

This function returns the statistic value of the logarithmic minimum independence test in the four-way contingency table.

Lms4.stat(table5)
#> [1] 116.0267
Lms4.stat(table6)
#> [1] 4.097161

This function returns the critical value of the logarithmic minimum independence test in the four-way contingency table.

Lms4.cv(2, 2, 2, 2, 160, 0.05, B = 1e2)
#> [1] 5.321681
Lms4.cv(2, 2, 2, 2, 160, 0.1, B = 1e3)
#> [1] 4.764324

This function returns the p-value of the logarithmic minimum independence test in the four-way contingency table.

Lms4.pvalue(Lms4.stat(table6), 2, 2, 2, 2, 160, B = 1e2)
#> [1] 0.2475248
Lms4.pvalue(Lms4.stat(table6), 2, 2, 2, 2, 160, B = 1e3)
#> [1] 0.2597403

This function returns the test statistic and p-value of the logarithmic minimum independence test in the four-way contingency table.

Lms4.test(table6, B = 1e2)
#> 
#>  Logarithmic minimum test for independence in four-way contingency table
#> 
#> data:  table6
#> D = 4.0972, p-value = 0.248
Lms4.test(table6, B = 1e3)
#> 
#>  Logarithmic minimum test for independence in four-way contingency table
#> 
#> data:  table6
#> D = 4.0972, p-value = 0.2513

PSIndependenceTest: Independence Tests for Two-Way, Three-Way and Four-Way Contingency Tables

Installation

Functions