Data Set 10-4: Gerbils Were Used to Assess the Effect

Multiple Choice

Data Set 10-4: Gerbils were used to assess the effect of Natural Neutral, a drug designed to reduce emotionality in high-drive people. Each of 20 gerbils spent 10 solitary minutes in an open field. The investigator recorded the number of fecal boluses for each animal. Then each animal was given an injection of Natural Neutral and the open field task was repeated. The following data were produced (large numbers indicate high emotionality) .
$$\begin{array} { l l l } & \text { No Drug } & \text { Drug } \\ \text { mean number of boluses } & 6 & 8 \\\text { standard deviation of boluses } & 2 & 2 \\\end{array}$$
$\text { correlation coefficient between Drug and No Drug Score } = .50$
-The proper conclusion from Data Set 10-4 is that Natural Neutral

A) reduces emotionality
B) increases emotionality
C) has no significant effect on emotionality.