t检验（t-test）临界值表（临界置信水平） 下载
| n’ | P(2): | 0.5 | 0.2 | 0.1 | 0.05 | 0.02 | 0.01 | 0.005 | 0.002 | 0.001 |
| P(1): | 0.25 | 0.1 | 0.05 | 0.025 | 0.01 | 0.005 | 0.0025 | 0.001 | 0.0005 | |
| 1 | 1 | 3.078 | 6.314 | 12.706 | 31.821 | 63.657 | 127.321 | 318.309 | 636.619 | |
| 2 | 0.816 | 1.886 | 2.92 | 4.303 | 6.965 | 9.925 | 14.089 | 22.327 | 31.599 | |
| 3 | 0.765 | 1.638 | 2.353 | 3.182 | 4.541 | 5.841 | 7.453 | 10.215 | 12.924 | |
| 4 | 0.741 | 1.533 | 2.132 | 2.776 | 3.747 | 4.604 | 5.598 | 7.173 | 8.61 | |
| 5 | 0.727 | 1.476 | 2.015 | 2.571 | 3.365 | 4.032 | 4.773 | 5.893 | 6.869 | |
| 6 | 0.718 | 1.44 | 1.943 | 2.447 | 3.143 | 3.707 | 4.317 | 5.208 | 5.959 | |
| 7 | 0.711 | 1.415 | 1.895 | 2.365 | 2.998 | 3.499 | 4.029 | 4.785 | 5.408 | |
| 8 | 0.706 | 1.397 | 1.86 | 2.306 | 2.896 | 3.355 | 3.833 | 4.501 | 5.041 | |
| 9 | 0.703 | 1.383 | 1.833 | 2.262 | 2.821 | 3.25 | 3.69 | 4.297 | 4.781 | |
| 10 | 0.7 | 1.372 | 1.812 | 2.228 | 2.764 | 3.169 | 3.581 | 4.144 | 4.587 | |
| 11 | 0.697 | 1.363 | 1.796 | 2.201 | 2.718 | 3.106 | 3.497 | 4.025 | 4.437 | |
| 12 | 0.695 | 1.356 | 1.782 | 2.179 | 2.681 | 3.055 | 3.428 | 3.93 | 4.318 | |
| 13 | 0.694 | 1.35 | 1.771 | 2.16 | 2.65 | 3.012 | 3.372 | 3.852 | 4.221 | |
| 14 | 0.692 | 1.345 | 1.761 | 2.145 | 2.624 | 2.977 | 3.326 | 3.787 | 4.14 | |
| 15 | 0.691 | 1.341 | 1.753 | 2.131 | 2.602 | 2.947 | 3.286 | 3.733 | 4.073 | |
| 16 | 0.69 | 1.337 | 1.746 | 2.12 | 2.583 | 2.921 | 3.252 | 3.686 | 4.015 | |
| 17 | 0.689 | 1.333 | 1.74 | 2.11 | 2.567 | 2.898 | 3.222 | 3.646 | 3.965 | |
| 18 | 0.688 | 1.33 | 1.734 | 2.101 | 2.552 | 2.878 | 3.197 | 3.61 | 3.922 | |
| 19 | 0.688 | 1.328 | 1.729 | 2.093 | 2.539 | 2.861 | 3.174 | 3.579 | 3.883 | |
| 20 | 0.687 | 1.325 | 1.725 | 2.086 | 2.528 | 2.845 | 3.153 | 3.552 | 3.85 | |
| 21 | 0.686 | 1.323 | 1.721 | 2.08 | 2.518 | 2.831 | 3.135 | 3.527 | 3.819 | |
| 22 | 0.686 | 1.321 | 1.717 | 2.074 | 2.508 | 2.819 | 3.119 | 3.505 | 3.792 | |
| 23 | 0.685 | 1.319 | 1.714 | 2.069 | 2.5 | 2.807 | 3.104 | 3.485 | 3.768 | |
| 24 | 0.685 | 1.318 | 1.711 | 2.064 | 2.492 | 2.797 | 3.091 | 3.467 | 3.745 | |
| 25 | 0.684 | 1.316 | 1.708 | 2.06 | 2.485 | 2.787 | 3.078 | 3.45 | 3.725 | |
| 26 | 0.684 | 1.315 | 1.706 | 2.056 | 2.479 | 2.779 | 3.067 | 3.435 | 3.707 | |
| 27 | 0.684 | 1.314 | 1.703 | 2.052 | 2.473 | 2.771 | 3.057 | 3.421 | 3.69 | |
| 28 | 0.683 | 1.313 | 1.701 | 2.048 | 2.467 | 2.763 | 3.047 | 3.408 | 3.674 | |
| 29 | 0.683 | 1.311 | 1.699 | 2.045 | 2.462 | 2.756 | 3.038 | 3.396 | 3.659 | |
| 30 | 0.683 | 1.31 | 1.697 | 2.042 | 2.457 | 2.75 | 3.03 | 3.385 | 3.646 | |
| 31 | 0.682 | 1.309 | 1.696 | 2.04 | 2.453 | 2.744 | 3.022 | 3.375 | 3.633 | |
| 32 | 0.682 | 1.309 | 1.694 | 2.037 | 2.449 | 2.738 | 3.015 | 3.365 | 3.622 | |
| 33 | 0.682 | 1.308 | 1.692 | 2.035 | 2.445 | 2.733 | 3.008 | 3.356 | 3.611 | |
| 34 | 0.682 | 1.307 | 1.091 | 2.032 | 2.441 | 2.728 | 3.002 | 3.348 | 3.601 | |
| 35 | 0.682 | 1.306 | 1.69 | 2.03 | 2.438 | 2.724 | 2.996 | 3.34 | 3.591 | |
| 36 | 0.681 | 1.306 | 1.688 | 2.028 | 2.434 | 2.719 | 2.99 | 3.333 | 3.582 | |
| 37 | 0.681 | 1.305 | 1.687 | 2.026 | 2.431 | 2.715 | 2.985 | 3.326 | 3.574 | |
| 38 | 0.681 | 1.304 | 1.686 | 2.024 | 2.429 | 2.712 | 2.98 | 3.319 | 3.566 | |
| 39 | 0.681 | 1.304 | 1.685 | 2.023 | 2.426 | 2.708 | 2.976 | 3.313 | 3.558 | |
| 40 | 0.681 | 1.303 | 1.684 | 2.021 | 2.423 | 2.704 | 2.971 | 3.307 | 3.551 | |
| 50 | 0.679 | 1.299 | 1.676 | 2.009 | 2.403 | 2.678 | 2.937 | 3.261 | 3.496 | |
| 60 | 0.679 | 1.296 | 1.671 | 2 | 2.39 | 2.66 | 2.915 | 3.232 | 3.46 | |
| 70 | 0.678 | 1.294 | 1.667 | 1.994 | 2.381 | 2.648 | 2.899 | 3.211 | 3.436 | |
| 80 | 0.678 | 1.292 | 1.664 | 1.99 | 2.374 | 2.639 | 2.887 | 3.195 | 3.416 | |
| 90 | 0.677 | 1.291 | 1.662 | 1.987 | 2.368 | 2.632 | 2.878 | 3.183 | 3.402 | |
| 100 | 0.677 | 1.29 | 1.66 | 1.984 | 2.364 | 2.626 | 2.871 | 3.174 | 3.39 | |
| 200 | 0.676 | 1.286 | 1.653 | 1.972 | 2.345 | 2.601 | 2.839 | 3.131 | 3.34 | |
| 500 | 0.675 | 1.283 | 1.648 | 1.965 | 2.334 | 2.586 | 2.82 | 3.107 | 3.31 | |
| 1000 | 0.675 | 1.282 | 1.646 | 1.962 | 2.33 | 2.581 | 2.813 | 3.098 | 3.3 | |
| ∝ | 0.6745 | 1.2816 | 1.6449 | 1.96 | 2.3263 | 2.5758 | 2.807 | 3.0902 | 3.2905 |