A medical researcher wishes to try three different techniques to lower blood pressure of patients with high blood pressure. The subjects are randomly selected and assigned to one of three groups. Group 1 is given
Medication, Group 2 is given an exercise program, and Group 3 is assigned a diet program. At the end of six
Weeks, the reduction in each subjectʹs blood pressure is recorded. Use the Kruskal-Wallis test to find the critical
Value to test the claim that there is no difference in the distribution of the populations. Use $$\alpha$$ = 0.05. $$\begin{array} { c | c | c }
\text { Group 1 } & \text { Group 2 } & \text { Group 3 } \
\hline 13 & 10 & 8 \
14 & 7 & 14 \
11 & 4 & 6 \
17 & 5 & 10 \
15 & 6 & 11 \
10 & 2 & 6
\end{array}$$
A)5.991
B)4.153
C)3.195
D)1.960

Question

A medical researcher wishes to try three different techniques to lower blood pressure of patients with high blood pressure. The subjects are randomly selected and assigned to one of three groups. Group 1 is given
Medication, Group 2 is given an exercise program, and Group 3 is assigned a diet program. At the end of six
Weeks, the reduction in each subjectʹs blood pressure is recorded. Use the Kruskal-Wallis test to find the critical
Value to test the claim that there is no difference in the distribution of the populations. Use $$\alpha$$ = 0.05. $$\begin{array} { c | c | c } 
\text { Group 1 } & \text { Group 2 } & \text { Group 3 } \
\hline 13 & 10 & 8 \
14 & 7 & 14 \
11 & 4 & 6 \
17 & 5 & 10 \
15 & 6 & 11 \
10 & 2 & 6
\end{array}$$
A)5.991
B)4.153
C)3.195
D)1.960

Quizplus · Accepted Answer

The Kruskal-Wallis test is a non-parametric method used to determine if there are statistically significant differences between the medians of three or more independent groups. For three groups and a significance level ($$\alpha$$) of 0.05, the critical value from the chi-square distribution table with 2 degrees of freedom is 5.991.

A Medical Researcher Wishes to Try Three Different Techniques to Lower