layard function

Test for homogeneity of variances of Layard

layard Performs the test for homogeneity of variances of Layard for Jackknife (1973).

layard(trat, resp, t, r)

Arguments

• trat: Numeric or complex vector containing treatments.
• resp: Numeric or complex vector containing the response variable.
• t: Number of treatments.
• r: Numeric or complex vector containing the number of replications of each treatment.

Returns

Returns the p-value of the Layard test of homogeneity of variances and its practical interpretation for the significance level of 5%.

Examples

data(ex1)
attach(ex1)
crd(trat, ig, quali = FALSE, hvar = "layard")

References

LAYARD, M. N. J. Robust large-sample tests for homogeneity of variances. Journal of the American Statistical Association, v.68, n.341, p.195-198, 1973.

NOGUEIRA, D, P.; PEREIRA, G, M. Desempenho de testes para homogeneidade de variancias em delineamentos inteiramente casualizados. Sigmae, Alfenas, v.2, n.1, p. 7-22. 2013.

See Also

bartlett, samiuddin, levene, oneillmathews.

Author(s)

Eric B Ferreira, eric.ferreira@unifal-mg.edu.br

@author Denismar Alves Nogueira @author Marcos Costa de Paula @author Mateus Pimenta Siqueira Lima