Agriculture Reference
In-Depth Information
Table A.3
Table of t statistics
Probability of a larger value, sign ignored
0.500
Degree of freedom
0.400
0.200
0.100
0.050
0.025
0.010
0.005
0.001
1
1.000
1.376
3.078
6.314
12.706
25.452
63.657
2
0.816
1.061
1.886
2.920
4.303
6.205
9.925
14.089
31.598
3
.765
0.978
1.638
2.535
3.182
4.176
5.841
7.453
12.941
4
.741
.941
1.533
2.132
2.776
3.495
4.604
5.598
8.610
5
.727
.920
1.476
2.015
2.571
3.163
4.032
4.773
6.859
6
.718
.906
1.440
1.943
2.447
2.969
3.707
4.317
5.956
7
.711
.896
1.415
1.895
2.365
2.841
3.499
4.029
5.405
8
.706
.889
1.397
1.860
2.306
2.752
3.355
3.832
5.041
9
.703
.883
1.383
1.833
2.262
2.685
3.250
3.690
4.781
10
.700
.879
1.372
1.812
2.228
2.634
3.199
3.581
4.587
11
.697
.876
1.363
1.796
2.201
2.593
3.106
3.497
4.437
12
.695
.873
1.356
1.782
2.179
2.560
3.055
3.428
4.318
13
.694
.870
1.350
1.771
2.160
2.533
3.012
3.372
4.221
14
.692
.868
1.345
1.761
2.145
2.510
2.977
3.326
4.410
15
.691
.866
1.341
1.753
2.131
2.490
2.947
3.286
4.073
16
.690
.865
1.337
1.746
2.120
2.473
2.921
3.252
4.015
17
.689
.863
1.333
1.740
2.110
2.458
2.898
3.222
3.965
18
.688
.862
1.330
1.734
2.101
2.445
2.878
3.197
3.922
19
.688
.861
1.328
1.729
2.093
2.433
2.861
3.174
3.883
20
.687
.860
1.325
1.725
2.086
2.423
2.845
3.153
3.850
21
.686
.859
1.323
1.721
2.080
2.414
2.831
3.135
3.819
22
.686
.858
1.321
1.717
2.074
2.406
2.819
3.119
3.792
23
.685
.858
1.319
1.714
2.069
2.398
2.807
3.104
3.767
24
.685
.857
1.318
1.711
2.064
2.391
2.797
3.090
3.745
25
.684
.856
1.316
1.708
2.060
2.385
2.787
3.078
3.725
26
.684
.856
1.315
1.706
2.056
2.379
2.779
3.067
3.707
27
.684
.855
1.314
1.703
2.052
2.373
2.771
3.056
3.690
28
.683
.855
1.313
1.701
2.048
2.368
2.763
3.047
3.674
29
.683
.854
1.311
1.699
2.045
2.364
2.756
3..038
3.659
30
.683
.854
1.310
1.697
2.042
2.360
2.750
3.030
3.646
35
.682
.852
1.306
1.690
2.030
2.342
2.724
2.996
3.591
40
.681
.851
1.303
1.684
2.021
2.329
2.704
2.971
3.551
45
.680
.850
1.301
1.680
2.014
2.319
2.690
2.952
3.520
50
.680
.849
1.299
1.676
2.008
2.310
2.678
2.937
3.486
55
.679
.849
1.297
1.673
2.004
2.304
2.669
2.925
3.476
60
.679
.848
1.296
1.661
2.000
2.299
2.660
2.915
3.460
70
.678
.847
1.294
1.667
1.994
2.290
2.648
2.899
3.435
80
.678
.847
1.293
1.665
1.989
2.284
2.638
2.887
3.416
90
.678
.846
1.291
1.662
1.986
2.279
2.631
2.878
3.402
100
.677
.846
1.290
1.661
1.982
2.276
2.625
2.871
3.390
120
.677
.845
1.289
1.658
1.980
2.270
2.617
2.860
3.373
1
.6745
.8416
1.2816
1.6448
1.9600
2.2414
2.5758
2.8070
3.2905
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