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	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	-	0.05	0.02	0.01	0.001
1	6.31	12.71	31.82	63.66	636.58
2	2.92	4.30	6.96	9.92	31.60
3	2.35	3.18	4.54	5.84	12.92
4	2.13	2.78	3.75	4.60	8.61
5	2.02	2.57	3.36	4.03	6.87
6	1.94	2.45	3.14	3.71	5.96
7	1.89	2.36	3.00	3.50	5.41
8	1.86	2.31	2.90	3.36	5.04
9	1.83	2.26	2.82	3.25	4.78
10	1.81	2.23	2.76	3.17	4.59
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
11	1.80	2.20	2.72	3.11	4.44
12	1.78	2.18	2.68	3.05	4.32
13	1.77	2.16	2.65	3.01	4.22
14	1.76	2.14	2.62	2.98	4.14
15	1.75	2.13	2.60	2.95	4.07
16	1.75	2.12	2.58	2.92	4.01
17	1.74	2.11	2.57	2.90	3.97
18	1.73	2.10	2.55	2.88	3.92
19	1.73	2.09	2.54	2.86	3.88
20	1.72	2.09	2.53	2.85	3.85
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
21	1.72	2.08	2.52	2.83	3.82
22	1.72	2.07	2.51	2.82	3.79
23	1.71	2.07	2.50	2.81	3.77
24	1.71	2.06	2.49	2.80	3.75
25	1.71	2.06	2.49	2.79	3.73
26	1.71	2.06	2.48	2.78	3.71
27	1.70	2.05	2.47	2.77	3.69
28	1.70	2.05	2.47	2.76	3.67
29	1.70	2.05	2.46	2.76	3.66
30	1.70	2.04	2.46	2.75	3.65
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
31	1.70	2.04	2.45	2.74	3.63
32	1.69	2.04	2.45	2.74	3.62
33	1.69	2.03	2.44	2.73	3.61
34	1.69	2.03	2.44	2.73	3.60
35	1.69	2.03	2.44	2.72	3.59
36	1.69	2.03	2.43	2.72	3.58
37	1.69	2.03	2.43	2.72	3.57
38	1.69	2.02	2.43	2.71	3.57
39	1.68	2.02	2.43	2.71	3.56
40	1.68	2.02	2.42	2.70	3.55
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
41	1.68	2.02	2.42	2.70	3.54
42	1.68	2.02	2.42	2.70	3.54
43	1.68	2.02	2.42	2.70	3.53
44	1.68	2.02	2.41	2.69	3.53
45	1.68	2.01	2.41	2.69	3.52
46	1.68	2.01	2.41	2.69	3.51
47	1.68	2.01	2.41	2.68	3.51
48	1.68	2.01	2.41	2.68	3.50
49	1.68	2.01	2.40	2.68	3.50
50	1.68	2.01	2.40	2.68	3.50
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
51	1.68	2.01	2.40	2.68	3.49
52	1.67	2.01	2.40	2.67	3.49
53	1.67	2.01	2.40	2.67	3.48
54	1.67	2.00	2.40	2.67	3.48
55	1.67	2.00	2.40	2.67	3.48
56	1.67	2.00	2.39	2.67	3.47
57	1.67	2.00	2.39	2.66	3.47
58	1.67	2.00	2.39	2.66	3.47
59	1.67	2.00	2.39	2.66	3.46
60	1.67	2.00	2.39	2.66	3.46
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
61	1.67	2.00	2.39	2.66	3.46
62	1.67	2.00	2.39	2.66	3.45
63	1.67	2.00	2.39	2.66	3.45
64	1.67	2.00	2.39	2.65	3.45
65	1.67	2.00	2.39	2.65	3.45
66	1.67	2.00	2.38	2.65	3.44
67	1.67	2.00	2.38	2.65	3.44
68	1.67	2.00	2.38	2.65	3.44
69	1.67	1.99	2.38	2.65	3.44
70	1.67	1.99	2.38	2.65	3.43
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
71	1.67	1.99	2.38	2.65	3.43
72	1.67	1.99	2.38	2.65	3.43
73	1.67	1.99	2.38	2.64	3.43
74	1.67	1.99	2.38	2.64	3.43
75	1.67	1.99	2.38	2.64	3.42
76	1.67	1.99	2.38	2.64	3.42
77	1.66	1.99	2.38	2.64	3.42
78	1.66	1.99	2.38	2.64	3.42
79	1.66	1.99	2.37	2.64	3.42
80	1.66	1.99	2.37	2.64	3.42
81	1.66	1.99	2.37	2.64	3.41
82	1.66	1.99	2.37	2.64	3.41
83	1.66	1.99	2.37	2.64	3.41
84	1.66	1.99	2.37	2.64	3.41
85	1.66	1.99	2.37	2.63	3.41
Top	Level of Significance for a Directional Test
	0.05	0.025	0.01	0.005	0.0005
	Level of Significance for a Non-directional Test
df	0.10	0.05	0.02	0.01	0.001
90	1.66	1.99	2.37	2.63	3.40
100	1.66	1.98	2.36	2.63	3.39
120	1.66	1.98	2.36	2.62	3.37
140	1.66	1.98	2.35	2.61	3.36
160	1.65	1.97	2.35	2.61	3.35
200	1.65	1.97	2.35	2.60	3.34
220	1.65	1.97	2.34	2.60	3.34

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