Week12 QM2

A researcher is examining the impact of three different teaching methods on student performance. What is the appropriate non-parametric test for this scenario?

• Mann-Whitney U test

• Kruskal-Wallis test

• Wilcoxon signed-rank test

• Friedman test

The Kruskal-Wallis test is an extension of the Mann-Whitney U test and is used to compare more than two independent samples.

• True

• False

In the Friedman test, if the null hypothesis is rejected, it indicates that at least one pair of related groups differs significantly.

• True

• False

In a study, researchers want to compare the exam scores of students from three different schools. Which statistical test should they use?

• Mann-Whitney U test

• Kruskal-Wallis test

• Friedman test

• Paired t-test

The Kruskal-Wallis test assumes that the populations from which the samples are drawn follow a normal distribution.

• True

• False

A group of participants is tested under three different conditions on a memory task. What test should be used to analyze the data?

• Mann-Whitney U test

• Kruskal-Wallis test

• Friedman test

• Independent samples t-test

The Kruskal-Wallis test is suitable for comparing independent groups, while the Friedman test is suitable for comparing related groups.

• True

• False