Pentru a calcula R1, respectiv R2, pentru fiecare nota se va face produsul dintre efectivul care a obtinut nota (in cadrul fiecarei clase) si rangul atribuit acestei note. In tabelul 3.3. este redat modul de calcul pentru exemplul ales de noi.

            Totalul rangurilor atribuite (R1 +R2) trebuie sa fie egal cu N(N+1)/2, in care N = N1 + N2. In exemplul  nostru R1 + R2 = (54x55)/2 = 1485.

            Adunand cele doua sume obtinute in tabelul de mai sus, avem: 605 + 880 = 1485

Критические значения критерия t-Стьюдента

(для проверки ненаправленных альтернатив — двусторонний критерий)

dfР

dfР

dfР

0,10 0,05 0,01 0,001 0,10 0,05 0,01 0,001 0,10 0,05 0,01 0,001

1 6,314 12,70 63,65 636,61 31 1,696 2,040 2,744 3,633 61 1,670 2,000 2,659 3,457

2 2,920 4,303 9,925 31,602 32 1,694 2,037 2,738 3,622 62 1,670 1,999 2,657 3,454

3 2,353 3,182 5,841 12,923 33 1,692 2,035 2,733 3,611 63 1,669 1,998 2,656 3,452

4 2,132 2,776 4,604 8,610 34 1,691 2,032 2,728 3,601 64 1,669 1,998 2,655 3,449

5 2,015 2,571 4,032 6,869 35 1,690 2,030 2,724 3,591 65 1,669 1,997 2,654 3,447

6 1,943 2,447 3,707 5,959 36 1,688 2,028 2,719 3,582 66 1,668 1,997 2,652 3,444

7 1,895 2,365 3,499 5,408 37 1,687 2,026 2,715 3,574 67 1,668 1,996 2,651 3,442

8 1,860 2,306 3,355 5,041 38 1,686 2,024 2,712 3,566 68 1,668 1,995 2,650 3,439

9 1,833 2,262 3,250 4,781 39 1,685 2,023 2,708 3,558 69 1,667 1,995 2,649 3,437

10 1,812 2,228 3,169 4,587 40 1,684 2,021 2,704 3,551 70 1,667 1,994 2,648 3,435

11 1,796 2,201 3,106 4,437 41 1,683 2,020 2,701 3,544 71 1,667 1,994 2,647 3,433

12 1,782 2,179 3,055 4,318 42 1,682 2,018 2,698 3,538 72 1,666 1,993 2,646 3,431

13 1,771 2,160 3,012 4,221 43 1,681 2,017 2,695 3,532 73 1,666 1,993 2,645 3,429

14 1,761 2,145 2,977 4,140 44 1,680 2,015 2,692 3,526 74 1,666 1,993 2,644 3,427

15 1,753 2,131 2,947 4,073 45 1,679 2,014 2,690 3,520 75 1,665 1,992 2,643 3,425

16 1,746 2,120 2,921 4,015 46 1,679 2,013 2,687 3,515 76 1,665 1,992 2,642 3,423

17 1,740 2,110 2,898 3,965 47 1,678 2,012 2,685 3,510 78 1,665 1,991 2,640 3,420

18 1,734 2,101 2,878 3,922 48 1,677 2,011 2,682 3,505 79 1,664 1,990 2,639 3,418

19 1,729 2,093 2,861 3,883 49 1,677 2,010 2,680 3,500 80 1,664 1,990 2,639 3,416

20 1,725 2,086 2,845 3,850 50 1,676 2,009 2,678 3,496 90 1,662 1,987 2,632 3,402

21 1,721 2,080 2,831 3,819 51 1,675 2,008 2,676 3,492 100 1,660 1,984 2,626 3,390

22 1,717 2,074 2,819 3,792 52 1,675 2,007 2,674 3,488 110 1,659 1,982 2,621 3,381

23 1,714 2,069 2,807 3,768 53 1,674 2,006 2,672 3,484 120 1,658 1,980 2,617 3,373

24 1,711 2,064 2,797 3,745 54 1,674 2,005 2,670 3,480 130 1,657 1,978 2,614 3,367

25 1,708 2,060 2,787 3,725 55 1,673 2,004 2,668 3,476 140 1,656 1,977 2,611 3,361

26 1,706 2,056 2,779 3,707 56 1,673 2,003 2,667 3,473 150 1,655 1,976 2,609 3,357

27 1,703 2,052 2,771 3,690 57 1,672 2,002 2,665 3,470 200 1,653 1,972 2,601 3,340

28 1,701 2,049 2,763 3,674 58 1,672 2,002 2,663 3,466 250 1,651 1,969 2,596 3,330

29 1,699 2,045 2,756 3,659 59 1,671 2,001 2,662 3,463 300 1,650 1,968 2,592 3,323

30 1,697 2,042 2,750 3,646 60 1,671 2,000 2,660 3,460 350 1,649 1,967 2,590 3,319