A scientist is hoping to compare the levels of DDT toxin found in three species of fish in a local river. He randomly samples 7 of each species to use in the analysis. For each fish, he measures the amount of DDT toxin present. The data is shown below: $$\begin{array}{l}
\text { Species }\
\begin{array} { c | c | c }
1 & 2 & 3 \
\hline 8.4 & 4.5 & 0.58 \
15 & 4.2 & 2 \
25 & 3 & 2.2 \
5.6 & 2.3 & 7.4 \
4.6 & 2.5 & 0.35 \
8.2 & 6.8 & 1.9 \
6.1 & 5.1 & 2.7
\end{array}
\end{array}$$ Ideally he will be able to determine if a difference exists in the population of DDT toxins found in the three fish species. Identify the test statistic for the Kruskal-Wallis H-Test.
A) H = 17.0
B) H = 10.286
C) H = 11.718
D) H = 5.714

Question

A scientist is hoping to compare the levels of DDT toxin found in three species of fish in a local river. He randomly samples 7 of each species to use in the analysis. For each fish, he measures the amount of DDT toxin present. The data is shown below: $$\begin{array}{l}
\text { Species }\
\begin{array} { c | c | c } 
1 & 2 & 3 \
\hline 8.4 & 4.5 & 0.58 \
15 & 4.2 & 2 \
25 & 3 & 2.2 \
5.6 & 2.3 & 7.4 \
4.6 & 2.5 & 0.35 \
8.2 & 6.8 & 1.9 \
6.1 & 5.1 & 2.7
\end{array}
\end{array}$$ Ideally he will be able to determine if a difference exists in the population of DDT toxins found in the three fish species. Identify the test statistic for the Kruskal-Wallis H-Test.
A) H = 17.0
B) H = 10.286
C) H = 11.718
D) H = 5.714

Quizplus · Accepted Answer

The Kruskal-Wallis H-Test is a non-parametric method for testing whether samples originate from the same distribution. The test statistic H is calculated based on the ranks of the data. Given the data provided, the correct calculation of the test statistic results in H = 11.718.

A Scientist Is Hoping to Compare the Levels of DDT