tukey function

Multiple comparison: Tukey's test

tukey Performs the test of Tukey, for multiple comparison of means.

tukey(y, trt, DFerror, SSerror, alpha = 0.05, group = TRUE, main = NULL)

Arguments

• y: Numeric or complex vector containing the response variable.
• trt: Numeric or complex vector containing the treatments.
• DFerror: Error degrees of freedom.
• SSerror: Error sum of squares.
• alpha: Significance level.
• group: TRUE or FALSE.
• main: Title.

Returns

y Numeric trt factor DFerror Numeric MSerror Numeric alpha Numeric group Logic main Text

Details

It is necessary first makes a analysis of variance.

Examples

data(ex1)
attach(ex1)
crd(trat, ig, quali = TRUE, mcomp = "tukey", sigT = 0.05)

References

Principles and procedures of statistics a biometrical approach Steel and Torry and Dickey. Third Edition 1997

See Also

scottknott, duncan, lsd, lsdb, ccboot, snk, ccF.

Author(s)

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

Denismar Alves Nogueira

Portya Piscitelli Cavalcanti (Adapted from Felipe de Mendiburu - GPL)