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Table 6 The below table shows the Mann–Whitney U- (where W is the test statistic) and T-test (where t is the test statistic and df is the degrees of freedom) results comparing storm damage probability (P-value) in soil fertility, soil water and soil type for a monoculture of Norway spruce

From: Under storm risk, economic productivity of Norway spruce (Picea abies (L.) H. Karst) in monoculture shows sharper decline than in mixture with European beech (Fagus sylvatica L.)

 

Mann–Whitney U-test

T-test

  

Spruce

W

p-Value

t

df

p-Value

Fertility low/medium

999,672

0.7941

− 0.37742

2833.3

0.7059

Fertility low/high

996,048

0.6693

− 0.72723

2831.4

0.4671

Soil water low/medium

1,010,692

0.8069

0.010785

2834

0.9914

Soil water low/high

1,010,764

0.8043

0.021956

2834

0.9825

Soil clay/loam

1,010,476

0.8146

0.076402

2834

0.9391

Soil sandy/loam

1000,104

0.8094

− 0.02141

2834

0.9829

Soil sandy/clay

1000,104

0.8094

− 0.025089

2834

0.98