A researcher tests three different brands of 2% milk to see how many grams of fat are in each 8 ounce glass. The results are shown below. What is the critical value for a Kruskal-Wallis test of this data at α = 0.10.
A) 6.251
B) 4.605
C) 0.211
D) 0.584

Question

A researcher tests three different brands of 2% milk to see how many grams of fat are in each 8 ounce glass. The results are shown below.  What is the critical value for a Kruskal-Wallis test of this data at α = 0.10.
A) 6.251 
B) 4.605 
C) 0.211 
D) 0.584

Quizplus · Accepted Answer

To compute the critical value for a Kruskal-Wallis test at α = 0.10 with three groups (or brands), we need to look at the chi-square distribution table with 2 degrees of freedom (df = k - 1, where k = number of groups/brands). 
For α = 0.10, the critical value is 4.605. Therefore, choice B is the correct answer.

A Researcher Tests Three Different Brands of 2% Milk to See