Eight Observations Taken for Two Variables Are as Follows A Develop a Scatter Diagram with X on the Horizontal

Essay

Eight observations taken for two variables are as follows: $$\begin{array} { c | c } x _ { i } & y _ { i } \\\hline 11 & 35 \\13 & 32 \\17 & 26 \\18 & 25 \\22 & 20 \\24 & 17 \\26 & 11 \\28 & 10\end{array}$$
a. Develop a scatter diagram with x on the horizontal axis.
b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?
c. Compute and interpret the sample covariance.
d. Compute and interpret the sample correlation coefficient.