Variables
a Sample of Eight Observations of Variables X and Y

Essay

Variables
A sample of eight observations of variables x and y is shown below: $$\begin{array} { | l | l l l l l l l l | } \hline x & 5 & 3 & 7 & 9 & 2 & 4 & 6 & 8 \\\hline y & 20 & 23 & 15 & 11 & 27 & 21 & 17 & 14 \\\hline\end{array}$$
-Calculate the coefficient of correlation r and comment on the relationship between x and y.
r = ____________________.
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