A Researcher Is Interested in the Survival Times of a Particular

Multiple Choice

A researcher is interested in the survival times of a particular organism after it is subjected to three substances. The first is a radioactive material, the second is a biological material, and the third is a chemical (nonradioactive) substance. Organisms are brought into contact with each of the three substances to see how long they will last (in hours) until they die. The times are recorded for each substance used in the study, and the results are given below:
$$\begin{array} { | l | l | } \hline \text { Substance type } & \text { Lifetime } \\\hline \text { Radioactive } & 26,29,33 \\\hline \text { Biological } & 27,29,31 \\\hline \text { Chemical } & 31,34,37 \\\hline\end{array}$$ Using appropriate technology, what is the value of the Kruskal-Wallis statistic, H, for these data?

A) H = 2.77
B) H = 3.10
C) H = 3.76
D) H = 5.99