1 1 pts Which statement is correct? The Wilcoxon Signed Rank test is used while a continuous variable is measured for three or more than three groups of subjects at two different times The nonparametric alternative to a one-way ANOVA is the Kruskal-Wallis U test There are no statistical assumptions to follow for non-parametric teststs O Spearman correlation is very similar to Pearson's correlation. It can be applied when all assumptions for Pearson's correlation are met