| y | x1 | x2 | x3 | x4 |
y | 1 | −0.3747 | −0.5330 | −0.6003 | −0.3095 |
x1 | −0.3747 | 1 | 0.9402 | 0.9425 | 0.9461 |
x2 | −0.5330 | 0.9402 | 1 | 0.9251 | 0.9161 |
x3 | −0.6003 | 0.9425 | 0.9251 | 1 | 0.9048 |
x4 | −0.3095 | 0.9461 | 0.9161 | 0.9048 | 1 |