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Math Drills
Variance & correlation
Correlation coefficient
Practice 1
Variance & correlation
Correlation coefficient
1 / 5
Standard
Find the correlation coefficient of the two variables x and y.
x
1
2
3
4
5
y
2
4
3
6
5
\begin{array}{c|ccccc} x & 1 & 2 & 3 & 4 & 5 \\ \hline y & 2 & 4 & 3 & 6 & 5 \end{array}
x
y
1
2
2
4
3
3
4
6
5
5
1
4
5
\frac{4}{5}
5
4
2
3
5
\frac{3}{5}
5
3
3
−
4
5
-\frac{4}{5}
−
5
4
4
2
5
\frac{2}{5}
5
2
Answer
