t Table
cum. prob one-tail two-tails	'.50 0.50 1.00	'.75 0.25 0.50	'.80 0.20 0.40	'.85 0.15 0.30	'.90 0.10 0.20	'.95 0.05 0.10	'.975 0.025 0.05	'.99 0.01 0.02	'.995 0.005 0.01	'.999 0.001 0.002	'.9995 0.0005 0.001
df 1 2 3 4 5	0.000 0.000 0.000 0.000 0.000	1.000 0.816 0.765 0.741 0.727	1.376 1.061 0.978 0.941 0.920	1.963 1.386 1.250 1.190 1.156	3.078 1.886 1.638 1.533 1.476	6.314 2.920 2.353 2.132 2.015	12.71 4.303 3.182 2.776 2.571	31.82 6.965 4.541 3.747 3.365	63.66 9.925 5.841 4.604 4.032	318.31 22.327 10.215 7.173 5.893	636.62 31.599 12.924 8.610 6.869
■	0.000 0.000 0.000 0.000 0.000	0.718 0.711 0.706 0.703 0.700	0.906 0.896 0.889 0.883 0.879	1.134 1.119 1.108 1.100 1.093	1.440 1.415 1.397 1.383 1.372	1.943 1.895 1.860 1.833 1.812	2.447 2.365 2.306 2.262 2.228	3.143 2.998 2.896 2.821 2.764	3.707 3.499 3.355 3.250 3.169	5.208 4.785 4.501 4.297 4.144	5.959 5.408 5.041 4.781 4.587
11 12 13 14 15	0.000 0.000 0.000 0.000 0.000	0.697 0.695 0.694 0.692 0.691	0.876 0.873 0.870 0.868 0.866	1.088 1.083 1.079 1.076 1.074	1.363 1.356 1.350 1.345 1.341	1.796 1.782 1.771 1.761 1.753	2.201 2.179 2.160 2.145 2.131	2.718 2.681 2.650 2.624 2.602	3.106 3.055 3.012 2.977 2.947	4.025 3.930 3.852 3.787 3.733	4.437 4.318 4.221 4.140 4.073
IS 20	0.000 0.000 0.000 0.000 0.000	0.690 0.689 0.688 0.688 0.687	0.865 0.863 0.862 0.861 0.860	1.071 1.069 1.067 1.066 1.064	1.337 1.333 1.330 1.328 1.325	1.746 1.740 1.734 1.729 1.725	2.120 2.110 2.101 2.093 2.086	2.583 2.567 2.552 2.539 2.528	2.921 2.898 2.878 2.861 2.845	3.686 3.646 3.610 3.579 3.552	4.015 3.965 3.922 3.883 3.850
21 22 23 24 25	0.000 0.000 0.000 0.000 0.000	0.686 0.686 0.685 0.685 0.684	0.859 0.858 0.858 0.857 0.856	1.063 1.061 1.060 1.059 1.058	1.323 1.321 1.319 1.318 1.316	1.721 1.717 1.714 1.711 1.708	2.080 2.074 2.069 2.064 2.060	2.518 2.508 2.500 2.492 2.485	2.831 2.819 2.807 2.797 2.787	3.527 3.505 3.485 3.467 3.450	3.819 3.792 3.768 3.745 3.725
26 27 28 29 30	0.000 0.000 0.000 0.000 0.000	0.684 0.684 0.683 0.683 0.683	0.856 0.855 0.855 0.854 0.854	1.058 1.057 1.056 1.055 1.055	1.315 1.314 1.313 1.311 1.310	1.706 1.703 1.701 1.699 1.697	2.056 2.052 2.048 2.045 2.042	2.479 2.473 2.467 2.462 2.457	2.779 2.771 2.763 2.756 2.750	3.435 3.421 3.408 3.396 3.385	3.707 3.690 3.674 3.659 3.646
40 60 80 100 1000	0.000 0.000 0.000 0.000 0.000	0.681 0.679 0.678 0.677 0.675	0.851 0.848 0.846 0.845 0.842	1.050 1.045 1.043 1.042 1.037	1.303 1.296 1.292 1.290 1.282	1.684 1.671 1.664 1.660 1.646	2.021 2.000 1.990 1.984 1.962	2.423 2.390 2.374 2.364 2.330	2.704 2.660 2.639 2.626 2.581	3.307 3.232 3.195 3.174 3.098	3.551 3.460 3.416 3.390 3.300
Z	0.000	0.674	0.842	1.036	1.282	1.645	1.960	2.326	2.576	3.090	3.291
	0%	50%	60%	70%	80%	90%	95%	98%	99%	99.8%	99.9%
Confidence Level
t-table.xls 7/14/2007