GATE (Graduate Aptitude Test in Engineering) Ecology & Evolution (EY): Questions 1 of 455
Appeared in Year: 2016
Question MCQ▾
The use of Kruskat Wallis test is most appropriate in which of these cases? (June)
Choices
Choice (4) | Response | |
---|---|---|
a. | There are two groups and each group is normally distributed. | |
b. | There are more than two groups and each group is normally distributed. | |
c. | There are two groups and the distribution in each group is not normal. | |
d. | There are more than two groups and the distribution in each group is not normal. |
Answer
d.
Explanation
- Kruskat Wallis test is a non-parametric rank based test. It is also known as one-way ANOVA of ranks. It is an extension of Mann-Whitney U test to allow the comparison of more than two independent groups. It is used to determine the significant difference between 2 or more groups of independent variable on a continuous or ordinal dependent variable.
- The Kruskal – Wallis test by ranks, Kruskal – Wallis H test (named after William Kruskal and W. Allen Wallis) , or one-way ANOVA on ranks is a non-parametric method for testing whether samples originate from the same distribution. It is used for comparing two or more independent samples of equal or different sample sizes.
- It is used to test whether samples originate from the same distribution. It is used to compare 2 or more independent samples of equal or different size. It does not assume a normal distribution unlike one way ANOVA.
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