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Assume a researcher compared the performance of four independent groups of participants on an ordinal variable using the Kruskal-Wallis H test. Each group had eight participants.
a. What is the df associated with this test?
b. Using a p level of 0.05 and a two-tailed test, what is the critical value?
c. Assume the researcher calculated H = 9.26. Make a decision regarding the null hypothesis and explain that decision.
d. Assume the researcher calculated H = 3.97. Make a decision regarding the null hypothesis and explain that decision.
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