Table A-3 t Distribution: Critical t Values
Area in One Tail: 0.005, 0.01, 0.025, 0.05, 0.10
Area in Two Tails: 0.01, 0.02, 0.05, 0.10, 0.20
Degrees of Freedom 1: 63.657, 31.821, 12.706, 6.314, 3.078
Degrees of Freedom 2: 9.925, 6.965, 4.303, 2.920, 1.886
Degrees of Freedom 3: 5.841, 4.541, 3.182, 2.353, 1.638
Degrees of Freedom 4: 4.604, 3.747, 2.776, 2.132, 1.533
Degrees of Freedom 5: 4.032, 3.365, 2.571, 2.015, 1.476
Degrees of Freedom 6: 3.707, 3.143, 2.447, 1.943, 1.440
Degrees of Freedom 7: 3.499, 2.998, 2.365, 1.895, 1.415
Degrees of Freedom 8: 3.355, 2.896, 2.306, 1.860, 1.397
Degrees of Freedom 9: 3.250, 2.821, 2.262, 1.833, 1.383
Degrees of Freedom 10: 3.169, 2.764, 2.228, 1.812, 1.372
Degrees of Freedom 11: 3.106, 2.718, 2.201, 1.796, 1.363
Degrees of Freedom 12: 3.055, 2.681, 2.179, 1.782, 1.356
Degrees of Freedom 13: 3.012, 2.650, 2.160, 1.771, 1.350
Degrees of Freedom 14: 2.977, 2.624, 2.145, 1.761, 1.345
Degrees of Freedom 15: 2.947, 2.602, 2.131, 1.753, 1.341
Degrees of Freedom 16: 2.921, 2.583, 2.120, 1.746, 1.337
Degrees of Freedom 17: 2.898, 2.567, 2.110, 1.740, 1.333
Degrees of Freedom 18: 2.878, 2.552, 2.101, 1.734, 1.330
Degrees of Freedom 19: 2.861, 2.539, 2.093, 1.729, 1.328
Degrees of Freedom 20: 2.845, 2.528, 2.086, 1.725, 1.325
Degrees of Freedom 21: 2.831, 2.518, 2.080, 1.721, 1.323
Degrees of Freedom 22: 2.819, 2.508, 2.074, 1.717, 1.321
Degrees of Freedom 23: 2.807, 2.500, 2.069, 1.714, 1.319
Degrees of Freedom 24: 2.797, 2.492, 2.064, 1.711, 1.318
Degrees of Freedom 25: 2.787, 2.485, 2.060, 1.708, 1.316
Degrees of Freedom 26: 2.779, 2.479, 2.056, 1.706, 1.315
Degrees of Freedom 27: 2.771, 2.473, 2.052, 1.703, 1.314