Suppose there is interest in comparing the median response time for three independent groups learning a specific task.The appropriate nonparametric procedure is
A)Wilcoxon Rank Sums Test.
B) test for the different among more than two proportions.
C)Kruskal-Wallis Rank Test.
D) test for independence.

Question

Suppose there is interest in comparing the median response time for three independent groups learning a specific task.The appropriate nonparametric procedure is
A)Wilcoxon Rank Sums Test. 
B) test for the different among more than two proportions. 
C)Kruskal-Wallis Rank Test. 
D) test for independence.

Quizplus · Accepted Answer

The Kruskal-Wallis Rank Test is appropriate for comparing the median response times for three or more independent groups. This test is a nonparametric alternative to the One-Way ANOVA and does not assume normality of the data. The Wilcoxon Rank Sums Test is appropriate for comparing two independent groups, not three, and the 11ebc114_1294_a437_8acb_f1598e9e2b7c_TB8562_11 test for different among more than two proportions and the 11ebc114_1294_a438_8acb_d9fb108ec414_TB8562_11 test for independence are not appropriate for comparing median response times. Kruskal-Wallis Rank Test is the appropriate nonparametric procedure for comparing the median response time for three independent groups. This test is used to compare three or more independent groups and is a non-parametric alternative to one-way ANOVA. Wilcoxon Rank Sums Test is used to compare the median of two independent groups, and Chi-squared test is used to compare proportions. Test for independence is used to determine whether there is a significant association between two categorical variables.

Suppose There Is Interest in Comparing the Median Response Time