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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