SACJR4
Rawono1
students_t_distribution_table.pdf
one-tail area 0.250 0.125 0.100 0.075 0.050 0.025 0.010 0.005 0.0005
two-tail area 0.500 0.250 0.200 0.150 0.100 0.050 0.020 0.010 0.0010
d.f. c 0.500 0.750 0.800 0.850 0.900 0.950 0.980 0.990 0.999
1
2
3
4
5
1.000 2.414 3.078 4.165 6.314 12.706 31.821 63.657 636.619
0.816 1.604 1.886 2.282 2.920 4.303 6.965 9.925 31.599
0.765 1.423 1.638 1.924 2.353 3.182 4.541 5.841 12.924
0.741 1.344 1.533 1.778 2.132 2.776 3.747 4.604 8.610
0.727 1.301 1.476 1.699 2.015 2.571 3.365 4.032 6.869
6
7
8
9
10
0.718 1.273 1.440 1.650 1.943 2.447 3.143 3.707 5.959
0.711 1.254 1.415 1.617 1.895 2.365 2.998 3.499 5.408
0.706 1.240 1.397 1.592 1.860 2.306 2.896 3.355 5.041
0.703 1.230 1.383 1.574 1.833 2.262 2.821 3.250 4.781
0.700 1.221 1.372 1.559 1.812 2.228 2.764 3.169 4.587
11
12
13
14
15
0.697 1.214 1.363 1.548 1.796 2.201 2.718 3.106 4.437
0.695 1.209 1.356 1.538 1.782 2.179 2.681 3.055 4.318
0.694 1.204 1.350 1.530 1.771 2.160 2.650 3.012 4.221
0.692 1.200 1.345 1.523 1.761 2.145 2.624 2.977 4.140
0.691 1.197 1.341 1.517 1.753 2.131 2.602 2.947 4.073
16
17
18
19
20
0.690 1.194 1.337 1.512 1.746 2.120 2.583 2.921 4.015
0.689 1.191 1.333 1.508 1.740 2.110 2.567 2.898 3.965
0.688 1.189 1.330 1.504 1.734 2.101 2.552 2.878 3.922
0.688 1.187 1.328 1.500 1.729 2.093 2.539 2.861 3.883
0.687 1.185 1.325 1.497 1.725 2.086 2.528 2.845 3.850
21
22
23
24
25
0.686 1.183 1.323 1.494 1.721 2.080 2.518 2.831 3.819
0.686 1.182 1.321 1.492 1.717 2.074 2.508 2.819 3.792
0.685 1.180 1.319 1.489 1.714 2.069 2.500 2.807 3.768
0.685 1.179 1.318 1.487 1.711 2.064 2.492 2.797 3.745
0.684 1.198 1.316 1.485 1.708 2.060 2.485 2.787 3.725
26
27
28
29
30
0.684 1.177 1.315 1.483 1.706 2.056 2.479 2.779 3.707
0.684 1.176 1.314 1.482 1.703 2.052 2.473 2.771 3.690
0.683 1.175 1.313 1.480 1.701 2.048 2.467 2.763 3.674
0.683 1.174 1.311 1.479 1.699 2.045 2.462 2.756 3.659
0.683 1.173 1.310 1.477 1.697 2.042 2.457 2.750 3.646
35
40
45
50
60
0.682 1.170 1.306 1.472 1.690 2.030 2.438 2.724 3.591
0.681 1.167 1.303 1.468 1.684 2.021 2.423 2.704 3.551
0.680 1.165 1.301 1.465 1.679 2.014 2.412 2.690 3.520
0.679 1.164 1.299 1.462 1.676 2.009 2.403 2.678 3.496
0.679 1.162 1.296 1.458 1.671 2.000 2.390 2.660 3.460
70
80
100
500
1000
0.678 1.160 1.294 1.456 1.667 1.994 2.381 2.648 3.435
0.678 1.159 1.292 1.453 1.664 1.990 2.374 2.639 3.416
0.677 1.157 1.290 1.451 1.660 1.984 2.364 2.626 3.390
0.675 1.152 1.283 1.442 1.648 1.965 2.334 2.586 3.310
0.675 1.151 1.282 1.441 1.646 1.962 2.330 2.581 3.300
00
0.674 1.150 1.282 1.440 1.645 1.960 2.326 2.576 3.291
c is a confidence level
Critical Values for Student’s t Distribution
Area c
–t 0 t
One-tail area
Right-tail area
0 t
Left-tail area
–t 0
Two-tail area
Area
–t 0 t
For degrees of freedom d.f. not in the table, use the closest d.f. that is smaller.
