A Researcher Is Interested in Whether a Correlation Exists Between

A researcher is interested in whether a correlation exists between Alcohol scores and Drug Abuse scores on the MAQ (Maryland Acquisition Questionnaire). A group of inmates, all of whom had at least two previous incarcerations, were given the MAQ and their Drug and Alcohol scores were compared. $$\begin{array} { c c c } \text { Subj\# } & \text { Drug } & \text { Alcohol } \\1 & 34 & 40 \\2 & 75 & 60 \\3 & 48 & 53 \\4 & 55 & 47 \\5 & 40 & 50 \\6 & 42 & 48 \\7 & 56 & 52 \\8 & 44 & 54 \\9 & 54 & 44 \\10 & 52 & 56 \\11 & 48 & 51 \\12 & 50 & 41 \\13 & 47 & 38 \\14 & 53 & 55 \\15 & 60 & 40 \\16 & 40 & 60 \\17 & 48 & 58 \\18 & 52 & 60 \\19 & 50 & 48 \\20 & 53 & 47\end{array}$$
-Find the Mean for each set of scores