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Table 4 T test for tree and shrub layer along the altitude

From: Altitudinal gradients of soil and vegetation carbon and nitrogen in a high altitude nature reserve of Karakoram ranges

Altitude (m)

Tree (LTN)

Shrub (LTN)

Tree (LTC)

Shrub (LTC)

2863

4

3.6

147.1

89.5

2900

1.5

6.4

48.8

143.1

2990

2.5

1.8

94.6

44.2

3006

2.7

2.9

100.8

88.4

3009

1.2

1.6

52.6

43.4

3050

4.1

2.2

95.6

88.7

3089

2.6

1.9

100.5

44.4

3177

5.4

1.4

143.6

52.2

Total

24

21.8

783.6

593.9

Mean

3

2.725

97.95

74.2375

Variance

1.99

2.73

1286.19

1230.55

Observations

8

8

8

8

Hypothesized mean difference

0

 

0

 

df

14

 

14

 

t Stat

0.36

 

1.34

 

p (T ≤ t) one-tail

0.36

 

0.10

 

t critical one-tail

1.76

 

1.76

 

p (T ≤ t) two-tail

0.73

 

0.20

 

t critical two-tail

2.14

 

2.14

 
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