Question

Please help here I dont now how to solve this problem

Answer 1

Step-by-step explanation:

Given:

To find:

The correlation coefficient

Let's go ahead and find the mean of x-values;

`\begin{gathered} \bar{X}=(18+20+22+25+31+35+38+40+50)/(9)=(279)/(9)=31 \\ \therefore\bar{X}=31 \end{gathered}`

Let's go ahead and find the mean of the y-values;

`\begin{gathered} \vec{Y}=(14+14+12+11+10+10+9+9+8)/(9)=(97)/(9)=10.78 \\ \vec{Y}=10.78 \end{gathered}`

Let's find the standard deviation of X using the below formula;