Quantile ANOVA
One-way ANOVA based on quantiles. Only known method to work well when tied values are likely to occur.
Qanova(formula, data, q = 0.5, nboot = 600)
formula |
an object of class formula. |
data |
an optional data frame for the input data. |
q |
quantile (or vector of quantiles) to be used. |
nboot |
number of bootstrap samples |
Test global hypothesis that J independent groups have equal quantiles (default: median) using the Harrell-Davis estimator. Performs well when there are tied values.
Qanova
an object of class "qanova"
containing:
psihat |
value of the test statistics |
contrasts |
contrasts |
p.value |
p-value |
call |
function call |
Wilcox, R. (2012). Introduction to Robust Estimation and Hypothesis Testing (3rd ed.). Elsevier.
## median comparison set.seed(123) fitmed <- Qanova(libido ~ dose, viagra, nboot = 200) fitmed ## 1st, 3rd quartile comparison set.seed(123) fitquart <- Qanova(libido ~ dose, viagra, q = c(0.25, 0.75), nboot = 200) fitquart
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