NARRBEGIN: Experience and Salary
Longevity and Salary
a Sample of Eight

NARRBEGIN: Experience and Salary
Longevity and Salary
A sample of eight observations of variables x (years of experience) and y (salary in $1,000s) is shown below:
$$\begin{array} { | c | c c c c c c c c | } \hline \boldsymbol { x } & 5 & 3 & 7 & 9 & 2 & 4 & 6 & \mathbf { 8 } \\\hline y & 20 & 23 & 15 & 11 & 27 & 21 & 17 & 14 \\\hline\end{array}$$ NARREND
-Consider the following data:
$$\begin{array} { | c | c c c c c | } \hline \boldsymbol { x } & 9 & 6 & 7 & 5 & 8 \\\hline y & 19 & 14 & 16 & 12 & 15 \\\hline\end{array}$$
a.Calculate the covariance and the coefficient of correlation for the sample.
b.What do these statistics tell you about the relationship between x and y?