## Student's t - Distribution Tables

Comparinga t Distribution with Five Degrees of Freedom with the StandardNormal Distribution Table of the Upper Percentage Points ofthe Student's t Distribution

 df Critical Values of Student's t 1-tailed .10 .05 .025 .01 .005 .0005 2-tailed .20 .10 .05 .02 .01 .001 1 3.078 6.314 12.706 31.821 63.657 636.619 2 1.886 2.920 4.303 6.965 9.925 31.598 3 1.683 2.353 3.182 4.5415 5.841 12.941 4 1.533 2.132 2.776 3.747 4.604 8.610 5 1.476 2.015 2.571 3.365 4.032 6.859 6 1.440 1.943 2.447 3.143 3.707 5.959 7 1.415 1.895 2.365 2.998 3.499 5.405 8 1.397 1.860 2.306 2.896 3.355 5.041 9 1.383 1.833 2.262 2.821 3.250 4.781 10 1.372 1.812 2.228 2.764 3.169 4.587 11 1.363 1.796 2.201 2.718 3.106 4.437 12 1.356 1.782 2.179 2.681 3.055 4.318 13 1.350 1.771 2.160 2.650 3.012 4.221 14 1.345 1.761 2.145 2.624 2.977 4.140 15 1.341 1.753 2.131 2.602 2.947 4.073 16 1.337 1.746 2.120 2.583 2.921 4.015 17 1.333 1.740 2.110 2.567 2.898 3.965 18 1.330 1.734 2.101 2.552 2.878 3.922 19 1.328 1.729 2.093 2.539 2.861 4.883 20 1.325 1.725 2.086 2.528 2.845 3.850 21 1.323 1.721 2.080 2.518 2.831 3.819 22 1.321 1.717 2.074 2.508 2.819 3.792 23 1.319 1.714 2.069 2.500 2.807 3.767 24 1.318 1.711 2.064 2.492 2.797 3.745 25 1.316 1.708 2.060 2.485 2.787 3.725 26 1.315 1.706 2.056 2.479 2.779 3.707 27 1.314 1.703 2.052 2.473 2.771 3.690 28 1.313 1.701 2.048 2.467 2.763 3.674 29 1.311 1.699 2.045 2.462 2.756 3.659 30 1.310 1.697 2.042 2.457 2.750 3.646 35 1.31 1.69 2.030 2.438 2.724 3.591 40 1.303 1.684 2.021 2.423 2.704 3.551 45 1.301 1.679 2.014 2.412 2.69 3.520 50 1.299 1.676 2.009 2.403 2.678 3.496 55 1.297 1.673 2.004 2.396 2.668 3.476 60 1.296 1.671 2.000 2.390 2.660 3.460 65 1.295 1.669 1.997 2.385 2.654 3.447 70 1.294 1.667 1.994 2.381 2.648 3.435 75 1.293 1.665 1.992 2.377 2.643 3.425 80 1.292 1.664 1.990 2.374 2.639 3.416 85 1.292 1.663 1.988 2.371 2.635 3.409 90 1.291 .662 1.987 2.368 2.632 3.402 95 1.291 1.661 1.985 2.366 2.629 3.396 100 1.290 1.660 1.984 2.364 2.626 3.390 120 1.289 1.658 1.980 2.358 2.617 3.373 Inf 1.282 1.645 1.960 2.236 2.576 3.291 1-tailed .10 .05 .025 .01 .005 .0005 2-tailed .20 .10 .05 .02 .01 .001