david.barton.test {vartest}

David Barton Test

Description

david.barton.test performs David Barton variance homogeneity test.

Usage

david.barton.test(formula, data, alpha = 0.05, na.rm = TRUE, verbose = TRUE) 

Arguments

formula

a formula of the form lhs ~ rhs where lhs gives the sample values and rhs the corresponding groups.

data

a tibble or data frame containing the variables in formula.

alpha

the level of significance to assess variance homogeneity. Default is set to alpha = 0.05.

na.rm

a logical value indicating whether NA values should be stripped before the computation proceeds.

verbose

a logical for printing output to R console.

Value

A list containing the following components:

statistic

the corresponding test statistic.

parameter

the parameter(s) of the approximate chi squared distribution of the test statistic.

p.value

the p-value of the test.

method

the character string "David Barton Test".

data

a data frame containing the variables in which NA values (if exist) are removed.

formula

a formula of the form lhs ~ rhs where lhs gives the sample values and rhs the corresponding groups.

Author(s)

Gozde Cosar and Osman Dag

References

Gibbons, J.D., Chakraborti, S. (2010). Nonparametric Statistical Inference. CRC Press, 5th Ed., 316-320.

Barton, D.E., David, F.N. (1958). A Test For Birth Order Effect. Annals of Human Genetics, 22:3, 250-257.

Conover, W.J., Johnson, M.E., Johnson, M.M. (1981). A Comparative Study of Tests for Homogeneity of Variances, with Applications to the Outer Continental Shelf Bidding Data. Technometrics, 23:4, 351-361.

Examples

library(vartest)

david.barton.test(Sepal.Length ~ Species, data = iris)