levene function

Test for homogeneity of variances of Levene

levene Performs the test for homogeneity of variances of Levene (1960).

levene(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 Levene's test of homogeneity of variances and its practical interpretation for significance level of 5%.

Examples

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

References

LEVENE, H. Robust tests for equality of variances. In: Olkin, I.; Ghurye, S.G.; Hoeffding, W.; Madow, W.G.; Mann, H.B. (eds.). Contribution to Probability and Statistics. Stanford, CA: Stanford University Press, pages 278-292, 1960.

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, layard, 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