X₁

X₂

X₃

X₄

X₅

X₆

X₇

X₈

X₉

Z score X₁

1.000

0.964

0.652

0.948

0.950

0.707

0.900

0.681

−0.817

Z score X₂

0.964

1.000

0.621

0.988

0.992

0.787

0.949

0.598

−0.808

Z score X₃

0.652

0.621

1.000

0.685

0.582

0.147

0.393

0.929

−0.152

Z score X₄

0.948

0.988

0.685

1.000

0.979

0.716

0.907

0.638

−0.732

Z score X₅

0.950

0.992

0.582

0.979

1.000

0.819

0.960

0.561

−0.790

Z score X₆

0.707

0.787

0.147

0.716

0.819

1.000

0.933

0.175

−0.820

Z score X₇

0.900

0.949

0.393

0.907

0.960

0.933

1.000

0.413

−0.887

Z score X₈

0.681

0.598

0.929

0.638

0.561

0.175

0.413

1.000

−0.237

Z score X₉

−0.817

−0.808

−0.152

−0.732

−0.790

−0.820

−0.887

−0.237

1.000