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Percentage Points for the t-Distribution


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If T has a t-distribution with ν degrees of freedom then a tabulated value, t, is such that P(T < t)=p%

νp(%)

75909597.59999.599.7599.999.95

11.0003.0786.31412.7131.8263.66127.3318.3636.6

20.8161.8862.9204.3036.9659.92514.0922.3331.60

30.7651.6382.3533.1824.5415.8417.45310.2112.92

40.7411.5332.1322.7763.7474.6045.5987.1738.610

50.7271.4762.0152.5713.3654.0324.7735.8936.869

60.7181.4401.9432.4473.1433.7074.3175.2085.959

70.7111.4151.8952.3652.9983.4994.0294.7855.408

80.7061.3971.8602.3062.8963.3553.8334.5015.041

90.7031.3831.8332.2622.8213.2503.6904.2974.781

100.7001.3721.8122.2282.7643.1693.5814.1444.587

110.6971.3631.7962.2012.7183.1063.4974.0254.437

120.6951.3561.7822.1792.6813.0553.4283.9304.318

130.6941.3501.7712.1602.6503.0123.3723.8524.221

140.6921.3451.7612.1452.6242.9773.3263.7874.140

150.6911.3411.7532.1312.6022.9473.2863.7334.073

160.6901.3371.7462.1202.5832.9213.2523.6864.015

170.6891.3331.7402.1102.5672.8983.2223.6463.965

180.6881.3301.7342.1012.5522.8783.1973.6103.922

190.6881.3281.7292.0932.5392.8613.1743.5793.883

200.6871.3251.7252.0862.5282.8453.1533.5523.850

210.6861.3231.7212.0802.5182.8313.1353.5273.819

220.6861.3211.7172.0742.5082.8193.1193.5053.792

230.6851.3191.7142.0692.5002.8073.1043.4853.768

240.6851.3181.7112.0642.4922.7973.0913.4673.745

250.6841.3161.7082.0602.4852.7873.0783.4503.725

260.6841.3151.7062.0562.4792.7793.0673.4353.707

270.6841.3141.7032.0522.4732.7713.0573.4213.690

280.6831.3131.7012.0482.4672.7633.0473.4083.674

290.6831.3111.6992.0452.4622.7563.0383.3963.659

300.6831.3101.6972.0422.4572.7503.0303.3853.646

400.6811.3031.6842.0212.4232.7042.9713.3073.551

600.6791.2961.6712.0002.3902.6602.9153.2323.460

1200.6771.2891.6581.9802.3582.6172.8603.1603.373

∞0.6741.2821.6451.9602.3262.5762.8073.0903.291

From A Dictionary of Statistics in Oxford Reference.

Subjects: Probability and Statistics.



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