при уровне значимости a: 0,10, 0,05, 0,01
|   Число степеней свободы  |    a  |    Число степеней свободы  |    a  |  ||||
|   0,1  |    0,05  |    0,01  |    0,1  |    0,05  |    0,01  |  ||
|   1  |    6,314  |    12,706  |    63,66  |  18 |   1,734  |    2,101  |    2,878  |  
|   2  |    2,92  |    4,3027  |    9,925  |    19  |    1,729  |    2,093  |    2,861  |  
|   3  |    2,353  |    3,1825  |    5,841  |    20  |    1,725  |    2,086  |    2,845  |  
|   4  |    2,132  |    2,7764  |    4,604  |    21  |    1,721  |    2,08  |    2,831  |  
|   5  |    2,015  |    2,5706  |    4,032  |    22  |    1,717  |    2,074  |    2,819  |  
|   6  |    1,943  |    2,4469  |    3,707  |    23  |    1,714  |    2,069  |    2,807  |  
|   7  |    1,895  |    2,3646  |    3,5  |    24  |    1,711  |    2,064  |    2,797  |  
|   8  |    1,86  |    2,306  |    3,355  |    25  |    1,708  |    2,06  |    2,787  |  
|   9  |    1,833  |    2,2622  |    3,25  |    26  |    1,706  |    2,056  |    2,779  |  
|   10  |    1,813  |    2,2281  |    3,169  |    27  |    1,703  |    2,052  |    2,771  |  
|   11  |    1,796  |    2,201  |    3,106  |    28  |    1,701  |    2,048  |    2,763  |  
|   12  |    1,782  |    2,1788  |    3,055  |    29  |    1,699  |    2,045  |    2,756  |  
|   13  |    1,771  |    2,1604  |    3,012  |    30  |    1,697  |    2,042  |    2,75  |  
|   14  |    1,761  |    2,1448  |    2,977  |    40  |    1,684  |    2,021  |    2,705  |  
|   15  |    1,753  |    2,1315  |    2,947  |    60  |    1,671  |    2  |    2,66  |  
|   16  |    1,746  |    2,1199,  |    2,921  |    120  |    1,658  |    1,98  |    2,617  |  
|   17  |    1,74  |    2,1098  |    2,898  |       |    1,645  |    1,96  |    2,576  |  
Александр Александрович Чалиев