Answer:
Explanation:
Given:
To find:
The correlation coefficient
Let's go ahead and find the mean of x-values;
[tex]\begin{gathered} \bar{X}=\frac{18+20+22+25+31+35+38+40+50}{9}=\frac{279}{9}=31 \\ \therefore\bar{X}=31 \end{gathered}[/tex]
Let's go ahead and find the mean of the y-values;
[tex]\begin{gathered} \vec{Y}=\frac{14+14+12+11+10+10+9+9+8}{9}=\frac{97}{9}=10.78 \\ \vec{Y}=10.78 \end{gathered}[/tex]
Let's find the standard deviation of X using the below formula;
