
Appendix J
S TUDENT’S
T
-DISTRIBUTION TABLE
Significant values
v
(
) of t- distribution (Two Tail Areas)
αα => )(
v
tt
d.f.
(v) Probability (Level of significance)
0.50 0.10 0.05 0.02 0.01 0.001
1 1.00 6.31 12.71 31.82 63.66 636.62
2 0.82 0.92 4.30 6.97 6.93 31.60
3 0.77 2.32 3.18 4.54 5.84 12.94
4 0.74 2.13 2.78 3.75 4.60 8.61
5 0.73 2.02 2.57 3.37 4.03 6.86
6 0.72 1.94 2.45 3.14 3.71 5.96
7 0.71 1.90 2.37 3.00 3.50 5.41
8 0.71 1.80 2.31 2.90 3.36 5.04
9 0.70 1.83 2.26 2.82 3.25 4.78
10 0.70 1.81 2.23 2.76 3.17 4.59
11 0.70 1.80 2.20 2.72 3.11 4.44
12 0.70 1.78 2.18 2.68 3.06 4.32