n/a 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Bảng giá trị phân vị Student t(n;a) 0.0005 0.001 0.005 0.01 0.015 0.02 0.025 636.61925 318.30884 63.65674 31.82052 21.20495 15.89454 12.70620 31.59905 22.32712 9.92484 6.96456 5.64278 4.84873 4.30265 12.92398 10.21453 5.84091 4.54070 3.89605 3.48191 3.18245 8.61030 7.17318 4.60409 3.74695 3.29763 2.99853 2.77645 6.86883 5.89343 4.03214 3.36493 3.00287 2.75651 2.57058 5.95882 5.20763 3.70743 3.14267 2.82893 2.61224 2.44691 5.40788 4.78529 3.49948 2.99795 2.71457 2.51675 2.36462 5.04131 4.50079 3.35539 2.89646 2.63381 2.44898 2.30600 4.78091 4.29681 3.24984 2.82144 2.57380 2.39844 2.26216 4.58689 4.14370 3.16927 2.76377 2.52748 2.35931 2.22814 4.43698 4.02470 3.10581 2.71808 2.49066 2.32814 2.20099 4.31779 3.92963 3.05454 2.68100 2.46070 2.30272 2.17881 4.22083 3.85198 3.01228 2.65031 2.43585 2.28160 2.16037 4.14045 3.78739 2.97684 2.62449 2.41490 2.26378 2.14479 4.07277 3.73283 2.94671 2.60248 2.39701 2.24854 2.13145 4.01500 3.68615 2.92078 2.58349 2.38155 2.23536 2.11991 3.96513 3.64577 2.89823 2.56693 2.36805 2.22385 2.10982 3.92165 3.61048 2.87844 2.55238 2.35618 2.21370 2.10092 3.88341 3.57940 2.86093 2.53948 2.34565 2.20470 2.09302 3.84952 3.55181 2.84534 2.52798 2.33624 2.19666 2.08596 3.81928 3.52715 2.83136 2.51765 2.32779 2.18943 2.07961 3.79213 3.50499 2.81876 2.50832 2.32016 2.18289 2.07387 3.76763 3.48496 2.80734 2.49987 2.31323 2.17696 2.06866 3.74540 3.46678 2.79694 2.49216 2.30691 2.17154 2.06390 3.72514 3.45019 2.78744 2.48511 2.30113 2.16659 2.05954 3.70661 3.43500 2.77871 2.47863 2.29581 2.16203 2.05553 3.68959 3.42103 2.77068 2.47266 2.29091 2.15782 2.05183 3.67391 3.40816 2.76326 2.46714 2.28638 2.15393 2.04841 3.65941 3.39624 2.75639 2.46202 2.28217 2.15033 2.04523 3.64596 3.38518 2.75000 2.45726 2.27826 2.14697 2.04227 3.63346 3.37490 2.74404 2.45282 2.27461 2.14383 2.03951 3.62180 3.36531 2.73848 2.44868 2.27120 2.14090 2.03693 3.61091 3.35634 2.73328 2.44479 2.26801 2.13816 2.03452 0.05 6.31375 2.91999 2.35336 2.13185 2.01505 1.94318 1.89458 1.85955 1.83311 1.81246 1.79588 1.78229 1.77093 1.76131 1.75305 1.74588 1.73961 1.73406 1.72913 1.72472 1.72074 1.71714 1.71387 1.71088 1.70814 1.70562 1.70329 1.70113 1.69913 1.69726 1.69552 1.69389 1.69236 0.075 4.16530 2.28193 1.92432 1.77819 1.69936 1.65017 1.61659 1.59222 1.57374 1.55924 1.54756 1.53796 1.52992 1.52310 1.51723 1.51213 1.50766 1.50371 1.50019 1.49704 1.49419 1.49162 1.48928 1.48714 1.48517 1.48336 1.48169 1.48014 1.47870 1.47736 1.47611 1.47494 1.47384 0.1 3.07768 1.88562 1.63774 1.53321 1.47588 1.43976 1.41492 1.39682 1.38303 1.37218 1.36343 1.35622 1.35017 1.34503 1.34061 1.33676 1.33338 1.33039 1.32773 1.32534 1.32319 1.32124 1.31946 1.31784 1.31635 1.31497 1.31370 1.31253 1.31143 1.31042 1.30946 1.30857 1.30774