Data Set 10-8: Drugs That Reduce Emotionality Make Big Money $$\begin{array} { r l } \text { Aloe } & \text { Vera } \\\hline 4 & 2 \\12 & 9 \\7 & 6 \\10 & 7 \\6 & 4\end{array}$$

Data Set 10-8: Drugs that reduce emotionality make big money for drug companies. These drugs undergo extensive testing, some of which is done with animals. One common test of emotionality in rats is the number of fecal boluses that are dropped when an animal is left for 10 minutes in an open field (a 4' x 4' space) . Greater emotionality is indicated by more boluses. Imagine that two drugs, aloe and vera were compared. Five rats were given aloe and five were given vera. The numbers below represent the number of boluses dropped in the open field. $$\begin{array} { r l } \text { Aloe } & \text { Vera } \\\hline 4 & 2 \\12 & 9 \\7 & 6 \\10 & 7 \\6 & 4\end{array}$$
-The experimenter described in Data Set 10-8 is an example of

A) a paired samples design
B) an independent samples design
C) determining the probability that a sample was drawn from a population with a known mean
D) cannot be determined from the information given.