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Table of Critical t-Values

Note:

The following table was copied directly from http://www.stattools.net/tTest_Tab.php, created by Allan Chang, Ph.D.; all I did was change the style very slightly. I make no claim whatsoever for the hard work that went in to making Dr. Chang’s nice original table.

I copied this here from Dr. Chang’s site so I could tweak it to my preferred way to use it and be sure it wouldn’t be gone if Dr. Chang’s site goes down or away.

Anyway, the columns group critical t-values by probability of Type I error (α); the rows are degrees of freedoms (i.e., n – 1). Each cell contains the critical t-value for that particular combination of df and α.

α (1 tail).05.025.01.005.0025.001.0005
α (2 tails).1.05.02.01.005.002.001
df
16.313812.706531.819363.6551127.3447318.4930636.0450
22.92004.30266.96469.924714.088722.327631.5989
32.35343.18244.54075.84087.453410.214512.9242
42.13192.77643.74704.60415.59767.17328.6103
52.01502.57063.36504.03224.77345.89346.8688
61.94322.44693.14263.70744.31685.20765.9589
71.89462.36462.99803.49954.02944.78525.4079
81.85952.30602.89653.35543.83254.50085.0414
91.83312.26212.82143.24983.68964.29694.7809
101.81242.22822.76383.16933.58144.14374.5869
111.79592.20102.71813.10583.49664.02474.4369
121.78232.17882.68103.05453.42843.92964.3178
131.77092.16042.65033.01233.37253.85204.2208
141.76132.14482.62452.97683.32573.78744.1404
151.75302.13142.60252.94673.28603.73284.0728
161.74592.11992.58352.92083.25203.68614.0150
171.73962.10982.56692.89833.22243.64583.9651
181.73412.10092.55242.87843.19663.61053.9216
191.72912.09302.53952.86093.17373.57943.8834
201.72472.08602.52802.84543.15343.55183.8495
211.72072.07962.51762.83143.13523.52723.8193
221.71722.07392.50832.81883.11883.50503.7921
231.71392.06862.49982.80733.10403.48503.7676
241.71092.06392.49222.79703.09053.46683.7454
251.70812.05962.48512.78743.07823.45023.7251
261.70562.05552.47862.77873.06693.43503.7067
271.70332.05182.47272.77073.05653.42113.6896
281.70112.04842.46712.76333.04693.40823.6739
291.69912.04522.46202.75643.03803.39623.6594
301.69732.04232.45722.75003.02983.38523.6459
311.69552.03952.45282.74403.02213.37493.6334
321.69392.03692.44872.73853.01503.36533.6218
331.69242.03452.44482.73333.00823.35633.6109
341.69092.03222.44112.72843.00193.34793.6008
351.68962.03012.43772.72382.99613.34003.5912
361.68832.02812.43452.71952.99053.33263.5822
371.68712.02622.43152.71542.98533.32563.5737
381.68592.02442.42862.71152.98033.31903.5657
391.68492.02272.42582.70792.97563.31283.5581
401.68392.02112.42332.70452.97123.30693.5510
411.68292.01962.42082.70122.96703.30133.5442
421.68202.01812.41852.69812.96303.29593.5378
431.68112.01672.41622.69512.95913.29093.5316
441.68022.01542.41422.69232.95553.28613.5258
451.67942.01412.41212.68962.95213.28153.5202
461.67872.01292.41022.68702.94883.27713.5149
471.67792.01172.40832.68462.94563.27293.5099
481.67722.01062.40662.68222.94263.26893.5051
491.67662.00962.40492.68002.93973.26513.5004
501.67592.00862.40332.67782.93703.26143.4960
511.67532.00762.40172.67572.93433.25793.4917
521.67472.00662.40022.67372.93183.25453.4877
531.67412.00572.39882.67182.92933.25133.4838
541.67362.00492.39742.67002.92703.24823.4800
551.67302.00412.39612.66822.92473.24513.4764
561.67252.00322.39482.66652.92253.24233.4730
571.67202.00252.39362.66492.92043.23943.4696
581.67152.00172.39242.66332.91843.23683.4663
591.67112.00102.39122.66182.91643.23423.4632
601.67062.00032.39012.66032.91463.23173.4602
611.67021.99962.38902.65892.91273.22933.4573
621.66981.99902.38802.65752.91103.22693.4545
631.66941.99832.38702.65612.90923.22473.4518
641.66901.99772.38602.65492.90763.22253.4491
651.66861.99712.38512.65362.90603.22043.4466
661.66831.99662.38422.65242.90453.21843.4441
671.66791.99602.38332.65122.90303.21643.4417
681.66761.99552.38242.65012.90153.21443.4395
691.66731.99502.38162.64902.90013.21263.4372
701.66691.99442.38082.64792.89873.21083.4350
711.66661.99392.38002.64682.89743.20903.4329
721.66631.99352.37932.64592.89613.20733.4308
731.66601.99302.37852.64492.89483.20563.4288
741.66571.99252.37782.64392.89363.20403.4269
751.66541.99212.37712.64302.89253.20253.4250
761.66521.99172.37642.64212.89133.20103.4232
771.66491.99132.37582.64122.89023.19953.4214
781.66461.99092.37512.64042.88913.19803.4197
791.66441.99042.37452.63952.88803.19663.4180
801.66411.99012.37392.63872.88703.19533.4164
811.66391.98972.37332.63792.88593.19393.4147
821.66361.98932.37272.63712.88503.19263.4132
831.66341.98892.37212.63642.88403.19133.4117
841.66321.98862.37162.63562.88313.19013.4101
851.66301.98832.37102.63492.88213.18893.4087
861.66281.98792.37052.63422.88133.18773.4073
871.66261.98762.37002.63352.88043.18663.4059
881.66231.98732.36952.63282.87953.18543.4046
891.66221.98702.36902.63222.87873.18443.4032
901.66201.98672.36852.63162.87793.18333.4020
911.66181.98642.36802.63092.87713.18223.4006
921.66161.98612.36762.63032.87633.18123.3995
931.66141.98582.36712.62972.87553.18023.3982
941.66121.98552.36672.62922.87483.17923.3970
951.66101.98522.36622.62862.87413.17823.3959
961.66091.98502.36582.62802.87343.17733.3947
971.66071.98472.36542.62752.87273.17643.3936
981.66061.98452.36502.62692.87203.17553.3926
991.66041.98422.36462.62642.87133.17463.3915
1001.66021.98402.36422.62592.87063.17383.3905
1011.66011.98372.36382.62542.87003.17293.3894
1021.65991.98352.36352.62492.86943.17203.3885
1031.65981.98332.36312.62442.86873.17123.3875
1041.65961.98302.36272.62402.86823.17043.3866
1051.65951.98282.36242.62352.86753.16973.3856
1061.65931.98262.36202.62302.86703.16893.3847
1071.65921.98242.36172.62252.86643.16813.3838
1081.65911.98222.36142.62212.86583.16743.3829
1091.65891.98202.36112.62172.86533.16673.3820
1101.65881.98182.36072.62122.86473.16603.3812
1111.65871.98162.36042.62082.86423.16533.3803
1121.65861.98142.36012.62042.86373.16463.3795
1131.65851.98122.35982.62002.86323.16403.3787
1141.65831.98102.35952.61962.86273.16333.3779
1151.65821.98082.35922.61922.86223.16263.3771
1161.65811.98062.35892.61892.86173.16203.3764
1171.65801.98052.35862.61852.86123.16143.3756
1181.65791.98032.35832.61812.86083.16073.3749
1191.65781.98012.35812.61782.86033.16013.3741
1201.65771.97992.35782.61742.85993.15953.3735
1211.65751.97982.35762.61712.85943.15893.3727
1221.65741.97962.35732.61682.85903.15843.3721
1231.65731.97942.35712.61642.85853.15783.3714
1241.65721.97932.35682.61612.85823.15733.3707
1251.65711.97912.35652.61582.85773.15673.3700
1261.65701.97902.35632.61542.85733.15623.3694
1271.65701.97882.35612.61512.85693.15563.3688
1281.65681.97872.35592.61482.85653.15513.3682
1291.65681.97852.35562.61452.85613.15463.3676
1301.65671.97842.35542.61422.85573.15413.3669
1311.65661.97822.35522.61392.85543.15363.3663
1321.65651.97812.35492.61362.85503.15313.3658
1331.65641.97792.35472.61332.85463.15263.3652
1341.65631.97782.35452.61302.85423.15223.3646
1351.65621.97772.35432.61272.85393.15173.3641
1361.65611.97762.35412.61252.85363.15123.3635
1371.65611.97742.35392.61222.85323.15083.3630
1381.65601.97732.35372.61192.85293.15033.3624
1391.65591.97722.35352.61172.85253.14993.3619
1401.65581.97712.35332.61142.85223.14953.3614
1411.65571.97692.35312.61122.85193.14913.3609
1421.65571.97682.35292.61092.85163.14863.3604
1431.65561.97672.35272.61062.85123.14823.3599
1441.65551.97662.35252.61042.85103.14783.3594
1451.65541.97652.35232.61022.85063.14743.3589
1461.65541.97642.35222.60992.85033.14703.3584
1471.65531.97622.35202.60972.85003.14663.3579
1481.65521.97612.35182.60942.84973.14623.3575
1491.65511.97602.35162.60922.84943.14583.3570
1501.65511.97592.35152.60902.84913.14553.3565
1511.65501.97582.35132.60882.84893.14513.3561
1521.65491.97572.35112.60852.84863.14473.3557
1531.65491.97562.35102.60832.84833.14433.3552
1541.65481.97552.35082.60812.84813.14403.3548
1551.65471.97542.35072.60792.84783.14363.3544
1561.65471.97532.35052.60772.84753.14333.3540
1571.65461.97522.35032.60752.84723.14303.3536
1581.65461.97512.35022.60732.84703.14263.3531
1591.65451.97502.35002.60712.84673.14233.3528
1601.65441.97492.34992.60692.84653.14193.3523
1611.65441.97482.34972.60672.84633.14173.3520
1621.65431.97472.34962.60652.84603.14133.3516
1631.65431.97462.34952.60632.84583.14103.3512
1641.65421.97452.34932.60622.84553.14073.3508
1651.65421.97442.34922.60602.84523.14033.3505
1661.65411.97442.34902.60582.84503.14003.3501
1671.65401.97432.34892.60562.84483.13983.3497
1681.65401.97422.34872.60542.84463.13943.3494
1691.65391.97412.34862.60522.84433.13923.3490
1701.65391.97402.34852.60512.84413.13883.3487
1711.65381.97392.34842.60492.84393.13863.3483
1721.65371.97392.34822.60472.84373.13833.3480
1731.65371.97382.34812.60462.84353.13803.3477
1741.65371.97372.34802.60442.84333.13773.3473
1751.65361.97362.34782.60422.84303.13753.3470
1761.65361.97352.34772.60412.84293.13723.3466
1771.65351.97352.34762.60392.84273.13693.3464
1781.65351.97342.34752.60372.84243.13663.3460
1791.65341.97332.34742.60362.84233.13643.3457
1801.65341.97322.34722.60342.84203.13613.3454
1811.65331.97312.34712.60332.84193.13583.3451
1821.65331.97312.34702.60312.84163.13563.3448
1831.65321.97302.34692.60302.84153.13543.3445
1841.65321.97292.34682.60282.84133.13513.3442
1851.65311.97292.34672.60272.84113.13493.3439
1861.65311.97282.34662.60252.84093.13463.3436
1871.65311.97272.34652.60242.84073.13443.3433
1881.65301.97272.34632.60222.84063.13413.3430
1891.65291.97262.34632.60212.84033.13393.3428
1901.65291.97252.34612.60192.84023.13373.3425
1911.65291.97252.34602.60182.84003.13343.3422
1921.65281.97242.34592.60172.83983.13323.3419
1931.65281.97232.34582.60152.83973.13303.3417
1941.65281.97232.34572.60142.83953.13283.3414
1951.65271.97222.34562.60132.83933.13263.3411
1961.65271.97212.34552.60122.83923.13233.3409
1971.65261.97212.34542.60102.83903.13213.3406
1981.65261.97202.34532.60092.83883.13193.3403
1991.65251.97202.34522.60082.83873.13173.3401
2001.65251.97192.34512.60072.83853.13153.3398