Y1

Y2

Y3

Y4

Y1

1.000

0.849

0.871

0.934

Y2

0.849

1.000

0.992

0.705

Y3

0.871

0.992

1.000

0.731

Y4

0.934

0.705

0.731

1.000

均值

0.9135

0.8865

0.8985

0.8425