Questions relate to the following output, which relates to a Friedman test, which compares scores at three timepoints on depression.Researchers used the exact test.
Ranks
Test Statistics a
a.Friedman Test
-A Kruskall Wallis test is a test which looks at the difference in:
A)ranks between three repeated measures conditions, and is especially useful when data is skewed
B)scores between three independent groups, and is especially useful when the data is normally distributed
C)scores between three repeated measures conditions, and is especially useful when the data is normally distributed
D)ranks between three independent groups, and is especially useful when data is skewed

Question

Questions relate to the following output, which relates to a Friedman test, which compares scores at three timepoints on depression.Researchers used the exact test.
Ranks
  Test Statistics a 
  a.Friedman Test
-A Kruskall Wallis test is a test which looks at the difference in:
A)ranks between three repeated measures conditions, and is especially useful when data is skewed 
B)scores between three independent groups, and is especially useful when the data is normally distributed 
C)scores between three repeated measures conditions, and is especially useful when the data is normally distributed 
D)ranks between three independent groups, and is especially useful when data is skewed

Quizplus · Accepted Answer

The Kruskal-Wallis test is a non-parametric method used for comparing three or more independent groups on a single outcome variable. It is particularly useful when the data does not meet the assumptions of normality, hence it compares ranks rather than scores and is used when data is skewed.

Questions Relate to the Following Output, Which Relates to a Friedman