A professor ranks the grades of students in each of three sections of a statistics course.He computes H = 6.83 for the Kruskal-Wallis H test to test for differences between the sections.What is the decision for this test?
A) retain the null hypothesis
B) reject the null hypothesis
C) there is not enough information to answer this question

Question

Quizplus · Accepted Answer

A Kruskal-Wallis test is used to determine if there are any significant differences between two or more groups of an independent variable on a continuous or ordinal dependent variable. The null hypothesis states that there is no significant difference between the groups. A significant H value indicates that at least one group is different from the others. Since H = 6.83 is significant, we reject the null hypothesis and conclude that there is at least one statistically significant difference between the three sections' grades.

A Professor Ranks the Grades of Students in Each of Three