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STUDENT’S t PERCENTAGE POINTS

ν 60.0% 66.7% 75.0% 80.0% 87.5% 90.0% 95.0% 97.5% 99.0% 99.5% 99.9%

1 0.325 0.577 1.000 1.376 2.414 3.078 6.314 12.706 31.821 63.657 318.31
2 0.289 0.500 0.816 1.061 1.604 1.886 2.920 4.303 6.965 9.925 22.327
3 0.277 0.476 0.765 0.978 1.423 1.638 2.353 3.182 4.541 5.841 10.215
4 0.271 0.464 0.741 0.941 1.344 1.533 2.132 2.776 3.747 4.604 7.173
5 0.267 0.457 0.727 0.920 1.301 1.476 2.015 2.571 3.365 4.032 5.893
6 0.265 0.453 0.718 0.906 1.273 1.440 1.943 2.447 3.143 3.707 5.208
7 0.263 0.449 0.711 0.896 1.254 1.415 1.895 2.365 2.998 3.499 4.785
8 0.262 0.447 0.706 0.889 1.240 1.397 1.860 2.306 2.896 3.355 4.501
9 0.261 0.445 0.703 0.883 1.230 1.383 1.833 2.262 2.821 3.250 4.297
10 0.260 0.444 0.700 0.879 1.221 1.372 1.812 2.228 2.764 3.169 4.144
11 0.260 0.443 0.697 0.876 1.214 1.363 1.796 2.201 2.718 3.106 4.025
12 0.259 0.442 0.695 0.873 1.209 1.356 1.782 2.179 2.681 3.055 3.930
13 0.259 0.441 0.694 0.870 1.204 1.350 1.771 2.160 2.650 3.012 3.852
14 0.258 0.440 0.692 0.868 1.200 1.345 1.761 2.145 2.624 2.977 3.787
15 0.258 0.439 0.691 0.866 1.197 1.341 1.753 2.131 2.602 2.947 3.733
16 0.258 0.439 0.690 0.865 1.194 1.337 1.746 2.120 2.583 2.921 3.686
17 0.257 0.438 0.689 0.863 1.191 1.333 1.740 2.110 2.567 2.898 3.646
18 0.257 0.438 0.688 0.862 1.189 1.330 1.734 2.101 2.552 2.878 3.610
19 0.257 0.438 0.688 0.861 1.187 1.328 1.729 2.093 2.539 2.861 3.579
20 0.257 0.437 0.687 0.860 1.185 1.325 1.725 2.086 2.528 2.845 3.552
21 0.257 0.437 0.686 0.859 1.183 1.323 1.721 2.080 2.518 2.831 3.527
22 0.256 0.437 0.686 0.858 1.182 1.321 1.717 2.074 2.508 2.819 3.505
23 0.256 0.436 0.685 0.858 1.180 1.319 1.714 2.069 2.500 2.807 3.485
24 0.256 0.436 0.685 0.857 1.179 1.318 1.711 2.064 2.492 2.797 3.467
25 0.256 0.436 0.684 0.856 1.178 1.316 1.708 2.060 2.485 2.787 3.450
26 0.256 0.436 0.684 0.856 1.177 1.315 1.706 2.056 2.479 2.779 3.435
27 0.256 0.435 0.684 0.855 1.176 1.314 1.703 2.052 2.473 2.771 3.421
28 0.256 0.435 0.683 0.855 1.175 1.313 1.701 2.048 2.467 2.763 3.408
29 0.256 0.435 0.683 0.854 1.174 1.311 1.699 2.045 2.462 2.756 3.396
30 0.256 0.435 0.683 0.854 1.173 1.310 1.697 2.042 2.457 2.750 3.385
35 0.255 0.434 0.682 0.852 1.170 1.306 1.690 2.030 2.438 2.724 3.340
40 0.255 0.434 0.681 0.851 1.167 1.303 1.684 2.021 2.423 2.704 3.307
45 0.255 0.434 0.680 0.850 1.165 1.301 1.679 2.014 2.412 2.690 3.281
50 0.255 0.433 0.679 0.849 1.164 1.299 1.676 2.009 2.403 2.678 3.261
55 0.255 0.433 0.679 0.848 1.163 1.297 1.673 2.004 2.396 2.668 3.245
60 0.254 0.433 0.679 0.848 1.162 1.296 1.671 2.000 2.390 2.660 3.232

∞ 0.253 0.431 0.674 0.842 1.150 1.282 1.645 1.960 2.326 2.576 3.090

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