To determine serum levels of nitrite in pediatric patients with human immunodefi

Question

To determine serum levels of nitrite in pediatric patients with human immunodeficiency virus type 1 (HIV-1), subjects including 10 healthy control children, seven children affected by AIDS, and 14 children who became seronegative for HIV-1 during the first year of life. Their serum levels are given in the table below. Which nonparametric test should be used to test for the difference? Control 0.301 0.167 0.201 0.234 0.268 0.268 0.201 0.234 0.268 0.301 Seronegativized 0.335 0.986 0.846 1.006 2.234 1.006 0.803 0.301 0.936 0.268 0.134 0.335 0.167 0.234 HIV-1 positive 0.503 0.268 0.335 0.946 0.846 0.268 0.268 Kruskal-Wallis Test 0 Friedman Test Median Test Mann-Whitney Test Wilcoxon Signed-rank Test

Explanation / Answer

Result:

Kruskal–Wallis test

The Kruskal-Wallis test is a rank-based nonparametric test that can be used to determine if there are statistically significant differences between more than 2 groups of an independent variable on a continuous or ordinal dependent variable.

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