取值范围

频数

占比

Spread > 546.25

2

1.98%

276.10 < Spread < 546.25

13

12.87%

−286.71 < Spread＜276.10

69

68.32%

−556.86 < Spread < −286.71

13

12.87%

Spread < −556.86

4

3.96%