What are Some Common Non-Parametric Tests Used in Nursing?
Mann-Whitney U Test: This test is used to compare differences between two independent groups, especially when data are ordinal or not normally distributed. For example, it can be used to compare patient satisfaction scores between two different wards. Wilcoxon Signed-Rank Test: This test is useful for comparing two related samples, such as pre-test and post-test scores of patients undergoing a specific treatment. Kruskal-Wallis Test: An extension of the Mann-Whitney U Test, the Kruskal-Wallis Test is used when comparing more than two independent groups. It might be employed to evaluate the effectiveness of different nursing interventions across multiple patient groups. Chi-Square Test: Often used to examine the association between two categorical variables, such as the relationship between smoking status and incidence of postoperative complications. Friedman Test: This test is used for repeated measures designs with more than two conditions. It could be used to analyze patient response to a series of treatments over time.
