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Hypothesis Testing Critical Values
Student t Distribution Probabilities Table
Chi Squared (χ^2 ) Distribution Probabilities
- Confidence Interval Critical Values, z α/ - Level of Confidence Critical Value, z α/ - 0.90 or 90% 1. - 0.95 or 95% 1. - 0.98 or 98% 2. - 0.99 or 99% 2. - 0.10 - 1.28 1.28 ±1. Level of Significance, α Left-Tailed Right-Tailed Two-Tailed - 0.05 - 1.645 1.645 ±1. - 0.01 - 2.33 2.33 ±2. - z .00 .01 .02 .03 .04 .05 .06 .07 .08.
- 3.4 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.
- 3.3 0.0005 0.0005 0.0005 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.
- 3.2 0.0007 0.0007 0.0006 0.0006 0.0006 0.0006 0.0006 0.0005 0.0005 0.
- 3.1 0.0010 0.0009 0.0009 0.0009 0.0008 0.0008 0.0008 0.0008 0.0007 0.
- 3.0 0.0013 0.0013 0.0013 0.0012 0.0012 0.0011 0.0011 0.0011 0.0010 0.
- 2.9 0.0019 0.0018 0.0018 0.0017 0.0016 0.0016 0.0015 0.0015 0.0014 0.
- 2.8 0.0026 0.0025 0.0024 0.0023 0.0023 0.0022 0.0021 0.0021 0.0020 0.
- 2.7 0.0035 0.0034 0.0033 0.0032 0.0031 0.0030 0.0029 0.0028 0.0027 0.
- 2.6 0.0047 0.0045 0.0044 0.0043 0.0041 0.0040 0.0039 0.0038 0.0037 0.
- 2.5 0.0062 0.0060 0.0059 0.0057 0.0055 0.0054 0.0052 0.0051 0.0049 0.
- 2.4 0.0082 0.0080 0.0078 0.0075 0.0073 0.0071 0.0069 0.0068 0.0066 0.
- 2.3 0.0107 0.0104 0.0102 0.0099 0.0096 0.0094 0.0091 0.0089 0.0087 0.
- 2.2 0.0139 0.0136 0.0132 0.0129 0.0125 0.0122 0.0119 0.0116 0.0113 0.
- 2.1 0.0179 0.0174 0.0170 0.0166 0.0162 0.0158 0.0154 0.0150 0.0146 0.
- 2.0 0.0228 0.0222 0.0217 0.0212 0.0207 0.0202 0.0197 0.0192 0.0188 0.
- 1.9 0.0287 0.0281 0.0274 0.0268 0.0262 0.0256 0.0250 0.0244 0.0239 0.
- 1.8 0.0359 0.0351 0.0344 0.0336 0.0329 0.0322 0.0314 0.0307 0.0301 0.
- 1.7 0.0446 0.0436 0.0427 0.0418 0.0409 0.0401 0.0392 0.0384 0.0375 0.
- 1.6 0.0548 0.0537 0.0526 0.0516 0.0505 0.0495 0.0485 0.0475 0.0465 0.
- 1.5 0.0668 0.0655 0.0643 0.0630 0.0618 0.0606 0.0594 0.0582 0.0571 0.
- 1.4 0.0808 0.0793 0.0778 0.0764 0.0749 0.0735 0.0721 0.0708 0.0694 0.
- 1.3 0.0968 0.0951 0.0934 0.0918 0.0901 0.0885 0.0869 0.0853 0.0838 0.
- 1.2 0.1151 0.1131 0.1112 0.1093 0.1075 0.1056 0.1038 0.1020 0.1003 0.
- 1.1 0.1357 0.1335 0.1314 0.1292 0.1271 0.1251 0.1230 0.1210 0.1190 0.
- 1.0 0.1587 0.1562 0.1539 0.1515 0.1492 0.1469 0.1446 0.1423 0.1401 0.
- 0.9 0.1841 0.1814 0.1788 0.1762 0.1736 0.1711 0.1685 0.1660 0.1635 0.
- 0.8 0.2119 0.2090 0.2061 0.2033 0.2005 0.1977 0.1949 0.1922 0.1894 0.
- 0.7 0.2420 0.2389 0.2358 0.2327 0.2296 0.2266 0.2236 0.2206 0.2177 0.
- 0.6 0.2743 0.2709 0.2676 0.2643 0.2611 0.2578 0.2546 0.2514 0.2483 0.
- 0.5 0.3085 0.3050 0.3015 0.2981 0.2946 0.2912 0.2877 0.2843 0.2810 0.
- 0.4 0.3446 0.3409 0.3372 0.3336 0.3300 0.3264 0.3228 0.3192 0.3156 0.
- 0.3 0.3821 0.3783 0.3745 0.3707 0.3669 0.3632 0.3594 0.3557 0.3520 0.
- 0.2 0.4207 0.4168 0.4129 0.4090 0.4052 0.4013 0.3974 0.3936 0.3897 0.
- 0.1 0.4602 0.4562 0.4522 0.4483 0.4443 0.4404 0.4364 0.4325 0.4286 0.
- 0.0 0.5000 0.4960 0.4920 0.4880 0.4840 0.4801 0.4761 0.4721 0.4681 0. - z .00 .01 .02 .03 .04 .05 .06 .07 .08. - 0.0 0.5000 0.5040 0.5080 0.5120 0.5160 0.5199 0.5239 0.5279 0.5319 0. - 0.1 0.5398 0.5438 0.5478 0.5517 0.5557 0.5596 0.5636 0.5675 0.5714 0. - 0.2 0.5793 0.5832 0.5871 0.5910 0.5948 0.5987 0.6026 0.6064 0.6103 0. - 0.3 0.6179 0.6217 0.6255 0.6293 0.6331 0.6368 0.6406 0.6443 0.6480 0. - 0.4 0.6554 0.6591 0.6628 0.6664 0.6700 0.6736 0.6772 0.6808 0.6844 0. - 0.5 0.6915 0.6950 0.6985 0.7019 0.7054 0.7088 0.7123 0.7157 0.7190 0. - 0.6 0.7257 0.7291 0.7324 0.7357 0.7389 0.7422 0.7454 0.7486 0.7517 0. - 0.7 0.7580 0.7611 0.7642 0.7673 0.7704 0.7734 0.7764 0.7794 0.7823 0. - 0.8 0.7881 0.7910 0.7939 0.7967 0.7995 0.8023 0.8051 0.8078 0.8106 0. - 0.9 0.8159 0.8186 0.8212 0.8238 0.8264 0.8289 0.8315 0.8340 0.8365 0. - 1.0 0.8413 0.8438 0.8461 0.8485 0.8508 0.8531 0.8554 0.8577 0.8599 0. - 1.1 0.8643 0.8665 0.8686 0.8708 0.8729 0.8749 0.8770 0.8790 0.8810 0. - 1.2 0.8849 0.8869 0.8888 0.8907 0.8925 0.8944 0.8962 0.8980 0.8997 0. - 1.3 0.9032 0.9049 0.9066 0.9082 0.9099 0.9115 0.9131 0.9147 0.9162 0. - 1.4 0.9192 0.9207 0.9222 0.9236 0.9251 0.9265 0.9279 0.9292 0.9306 0. - 1.5 0.9332 0.9345 0.9357 0.9370 0.9382 0.9394 0.9406 0.9418 0.9429 0. - 1.6 0.9452 0.9463 0.9474 0.9484 0.9495 0.9505 0.9515 0.9525 0.9535 0. - 1.7 0.9554 0.9564 0.9573 0.9582 0.9591 0.9599 0.9608 0.9616 0.9625 0. - 1.8 0.9641 0.9649 0.9656 0.9664 0.9671 0.9678 0.9686 0.9693 0.9699 0. - 1.9 0.9713 0.9719 0.9726 0.9732 0.9738 0.9744 0.9750 0.9756 0.9761 0. - 2.0 0.9772 0.9778 0.9783 0.9788 0.9793 0.9798 0.9803 0.9808 0.9812 0. - 2.1 0.9821 0.9826 0.9830 0.9834 0.9838 0.9842 0.9846 0.9850 0.9854 0. - 2.2 0.9861 0.9864 0.9868 0.9871 0.9875 0.9878 0.9881 0.9884 0.9887 0. - 2.3 0.9893 0.9896 0.9898 0.9901 0.9904 0.9906 0.9909 0.9911 0.9913 0. - 2.4 0.9918 0.9920 0.9922 0.9925 0.9927 0.9929 0.9931 0.9932 0.9934 0. - 2.5 0.9938 0.9940 0.9941 0.9943 0.9945 0.9946 0.9948 0.9949 0.9951 0. - 2.6 0.9953 0.9955 0.9956 0.9957 0.9959 0.9960 0.9961 0.9962 0.9963 0. - 2.7 0.9965 0.9966 0.9967 0.9968 0.9969 0.9970 0.9971 0.9972 0.9973 0. - 2.8 0.9974 0.9975 0.9976 0.9977 0.9977 0.9978 0.9979 0.9979 0.9980 0. - 2.9 0.9981 0.9982 0.9982 0.9983 0.9984 0.9984 0.9985 0.9985 0.9986 0. - 3.0 0.9987 0.9987 0.9987 0.9988 0.9988 0.9989 0.9989 0.9989 0.9990 0. - 3.1 0.9990 0.9991 0.9991 0.9991 0.9992 0.9992 0.9992 0.9992 0.9993 0. - 3.2 0.9993 0.9993 0.9994 0.9994 0.9994 0.9994 0.9994 0.9995 0.9995 0. - 3.3 0.9995 0.9995 0.9995 0.9996 0.9996 0.9996 0.9996 0.9996 0.9996 0. - 3.4 0.9997 0.9997 0.9997 0.9997 0.9997 0.9997 0.9997 0.9997 0.9997 0.
- one-tail area 0.25 0.125 0.1 0.075 0.05 0.025 0.01 0.005 0.
- two-tail area 0.5 0.25 0.2 0.15 0.1 0.05 0.02 0.01 0.
- confidence level 0.5 0.75 0.8 0.85 0.9 0.95 0.98 0.99 0.
- d.f. 1 1.000 2.414 3.078 4.165 6.314 12.706 31.821 63.657 636. - 2 0.816 1.604 1.886 2.282 2.920 4.303 6.965 9.925 31. - 3 0.765 1.423 1.638 1.924 2.353 3.182 4.541 5.841 12. - 4 0.741 1.344 1.533 1.778 2.132 2.776 3.747 4.604 8. - 5 0.727 1.301 1.476 1.699 2.015 2.571 3.365 4.032 6. - 6 0.718 1.273 1.440 1.650 1.943 2.447 3.143 3.707 5. - 7 0.711 1.254 1.415 1.617 1.895 2.365 2.998 3.499 5. - 8 0.706 1.240 1.397 1.592 1.860 2.306 2.896 3.355 5. - 9 0.703 1.230 1.383 1.574 1.833 2.262 2.821 3.250 4. - 10 0.700 1.221 1.372 1.559 1.812 2.228 2.764 3.169 4. - 11 0.697 1.214 1.363 1.548 1.796 2.201 2.718 3.106 4. - 12 0.695 1.209 1.356 1.538 1.782 2.179 2.681 3.055 4. - 13 0.694 1.204 1.350 1.530 1.771 2.160 2.650 3.012 4. - 14 0.692 1.200 1.345 1.523 1.761 2.145 2.624 2.977 4. - 15 0.691 1.197 1.341 1.517 1.753 2.131 2.602 2.947 4. - 16 0.690 1.194 1.337 1.512 1.746 2.120 2.583 2.921 4. - 17 0.689 1.191 1.333 1.508 1.740 2.110 2.567 2.898 3. - 18 0.688 1.189 1.330 1.504 1.734 2.101 2.552 2.878 3. - 19 0.688 1.187 1.328 1.500 1.729 2.093 2.539 2.861 3. - 20 0.687 1.185 1.325 1.497 1.725 2.086 2.528 2.845 3. - 21 0.686 1.183 1.323 1.494 1.721 2.080 2.518 2.831 3. - 22 0.686 1.182 1.321 1.492 1.717 2.074 2.508 2.819 3. - 23 0.685 1.180 1.319 1.489 1.714 2.069 2.500 2.807 3. - 24 0.685 1.179 1.318 1.487 1.711 2.064 2.492 2.797 3. - 25 0.684 1.198 1.316 1.485 1.708 2.060 2.485 2.787 3. - 26 0.684 1.177 1.315 1.483 1.706 2.056 2.479 2.779 3. - 27 0.684 1.176 1.314 1.482 1.703 2.052 2.473 2.771 3. - 28 0.683 1.175 1.313 1.480 1.701 2.048 2.467 2.763 3. - 29 0.683 1.174 1.311 1.479 1.699 2.045 2.462 2.756 3. - 30 0.683 1.173 1.310 1.477 1.697 2.042 2.457 2.750 3. - 35 0.682 1.170 1.306 1.472 1.690 2.030 2.438 2.724 3. - 40 0.681 1.167 1.303 1.468 1.684 2.021 2.423 2.704 3. - 45 0.680 1.165 1.301 1.465 1.679 2.014 2.412 2.690 3. - 50 0.679 1.164 1.299 1.462 1.676 2.009 2.403 2.678 3. - 60 0.679 1.162 1.296 1.458 1.671 2.000 2.390 2.660 3. - 70 0.678 1.160 1.294 1.456 1.667 1.994 2.381 2.648 3. - 80 0.678 1.159 1.292 1.453 1.664 1.990 2.374 2.639 3. - 100 0.677 1.157 1.290 1.451 1.660 1.984 2.364 2.626 3. - 500 0.675 1.152 1.283 1.442 1.648 1.965 2.334 2.586 3. - 1000 0.675 1.151 1.282 1.441 1.646 1.962 2.330 2.581 3. - infinity 0.674 1.150 1.282 1.440 1.645 1.960 2.326 2.576 3. - d.f. 0.995 0.99 0.975 0.95 0.9 0.1 0.05 0.025 0.01 0. Area to the Right of Critical Value - 1 — — 0.001 0.004 0.016 2.706 3.841 5.024 6.635 7. - 2 0.010 0.020 0.051 0.103 0.211 4.605 5.991 7.378 9.210 10. - 3 0.072 0.115 0.216 0.352 0.584 6.251 7.815 9.348 11.345 12. - 4 0.207 0.297 0.484 0.711 1.064 7.779 9.488 11.143 13.277 14. - 5 0.412 0.554 0.831 1.145 1.610 9.236 11.070 12.833 15.086 16. - 6 0.676 0.872 1.237 1.635 2.204 10.645 12.592 14.449 16.812 18. - 7 0.989 1.239 1.690 2.167 2.833 12.017 14.067 16.013 18.475 20. - 8 1.344 1.646 2.180 2.733 3.490 13.362 15.507 17.535 20.090 21. - 9 1.735 2.088 2.700 3.325 4.168 14.684 16.919 19.023 21.666 23. - 10 2.156 2.558 3.247 3.940 4.865 15.987 18.307 20.483 23.209 25. - 11 2.603 3.053 3.816 4.575 5.578 17.275 19.675 21.920 24.725 26. - 12 3.074 3.571 4.404 5.226 6.304 18.549 21.026 23.337 26.217 28. - 13 3.565 4.107 5.009 5.892 7.042 19.812 22.362 24.736 27.688 29. - 14 4.075 4.660 5.629 6.571 7.790 21.064 23.685 26.119 29.141 31. - 15 4.601 5.229 6.262 7.261 8.547 22.307 24.996 27.488 30.578 32. - 16 5.142 5.812 6.908 7.962 9.312 23.542 26.296 28.845 32.000 34. - 17 5.697 6.408 7.564 8.672 10.085 24.769 27.587 30.191 33.409 35. - 18 6.265 7.015 8.231 9.390 10.865 25.989 28.869 31.526 34.805 37. - 19 6.844 7.633 8.907 10.117 11.651 27.204 30.144 32.852 36.191 38. - 20 7.434 8.260 9.591 10.851 12.443 28.412 31.410 34.170 37.566 39. - 21 8.034 8.897 10.283 11.591 13.240 29.615 32.671 35.479 38.932 41. - 22 8.643 9.542 10.982 12.338 14.041 30.813 33.924 36.781 40.289 42. - 23 9.260 10.196 11.689 13.091 14.848 32.007 35.172 38.076 41.638 44. - 24 9.886 10.856 12.401 13.848 15.659 33.196 36.415 39.364 42.980 45. - 25 10.520 11.524 13.120 14.611 16.473 34.382 37.652 40.646 44.314 46. - 26 11.160 12.198 13.844 15.379 17.292 35.563 38.885 41.923 45.642 48. - 27 11.808 12.879 14.573 16.151 18.114 36.741 40.113 43.195 46.963 49. - 28 12.461 13.565 15.308 16.928 18.939 37.916 41.337 44.461 48.278 50. - 29 13.121 14.256 16.047 17.708 19.768 39.087 42.557 45.722 49.588 52. - 30 13.787 14.953 16.791 18.493 20.599 40.256 43.773 46.979 50.892 53. - 40 20.707 22.164 24.433 26.509 29.051 51.805 55.758 59.342 63.691 66. - 50 27.991 29.707 32.357 34.764 37.689 63.167 67.505 71.420 76.154 79. - 60 35.534 37.485 40.482 43.188 46.459 74.397 79.082 83.298 88.379 91. - 70 43.275 45.442 48.758 51.739 55.329 85.527 90.531 95.023 100.425 104. - 80 51.172 53.540 57.153 60.391 64.278 96.578 101.879 106.629 112.329 116. - 90 59.196 61.754 65.647 69.126 73.291 107.565 113.145 118.136 124.116 128. - 100 67.328 70.065 74.222 77.929 82.358 118.498 124.342 129.561 135.807 140.