Задачи для самостоятельного решения: Сравнить две кривые выживаемости. Сделать выводы.
Таблица. Продолжительность жизни после трансплантации костного мозга-
| Аутотранспланта
(1-я группа, n = 33)
| Аллотранспланта
(2-я группа, п = 21)
| Месяцы после
пересадки
| Число смертей
или выбытий
| Месяцы после
пересадки
| Число смертей
или выбытий
| 1
| 3
| 1
| 1
| 2
| 2
| 2
| 1
| 3
| 1
| 3
| 1
| 4
| 1
| 4
| 1
| 5
| 1
| 6
| 1
| 6
| 1
| 7
| 1
| 7
| 1
| 12
| 1
| 8
| 2
| 15+
| 1
| 10
| 1
| 20+
| 1
| 12
| 2
| 21+
| 1
| 14
| 1
| 24
| 1
| 17
| 1
| 30+
| 1
| 20+
| 1
| 60+
| 1
| 27
| 2
| 85+
| 2
| 28
| 1
| 86+
| 1
| 30
| 2
| 87+
| 1
| 36
| 1
| 90+
| 1
| 38+
| 1
| 100+
| 1
| 40+
| 1
| 119+
| 1
| 45+
| 1
| 132+
| 1
| 50
| 3
|
|
| 63+
| 1
|
|
| 132+
| 2
|
|
|
Таблица 1. Критические значения t Стъюдента
|
| Уровень значимости α
| f
| 0,50
| 0,20
| 0,10
| 0,05
| 0,02
| 0,01
| 0,005
| 0,002
| 0,001
| 1
| 1,000
| 3,078
| 6,314
| 12,706
| 31,821
| 63,657
| 127,321
| 318,309 i
| 636,619
| 2
| 0,816
| 1,886
| 2,920
| 4,303
| 6,965
| 9,925
| 14,089
| 22,327
| 31,599
| 3
| 0,765
| 1,638
| 2,353
| 3,182
| 4,541
| 5,841
| 7,453
| 10,215
| 12,924
| 4
| 0,741
| 1,533
| 2,132
| 2,776
| 3,747
| 4,604
| 5,598
| 7,173
| 8,610
| 5
| 0,727
| 1,476
| 2,015
| 2,571
| 3,365
| 4,032
| 4,773
| 5,893
| 6,869
| 6
| 0,718
| 1,440
| 1,943
| 2,447
| 3,143
| 3,707
| 4,317
| 5,208
| 5,959
| 7
| 0,711
| 1,415
| 1,895
| 2,365
| 2,998
| 3,499
| 4,029
| 4,785
| 5,408
| 8
| 0,706
| 1,397
| 1,860
| 2,306
| 2,896
| 3,355
| 3,833
| 4,501
| 5,041
| 9
| 0,703
| 1,383
| 1,833
| 2,262
| 2,821
| 3,250
| 3,690
| 4,297
| 4,781
| 10
| 0,700
| 1,372
| 1,812
| 2,228
| 2,764
| 3,169
| 3,581
| 4,144
| 4,587
| 11
| 0,697
| 1,363
| 1,796
| 2,201
| 2,718
| 3,106
| 3,497
| 4,025
| 4,437
| 12
| 0,695
| 1,356
| 1,782
| 2,179
| 2,681
| 3,055
| 3,428
| 3,930
| 4,318
| 13
| 0,694
| 1,350
| 1,771
| 2,160
| 2,650
| 3,012
| 3,372
| 3,852
| 4,221
| 14
| 0,692
| 1,345
| 1,761
| 2,145
| 2,624
| 2,977
| 3,326
| 3,787
| 4,140
| 15
| 0,691
| 1,341
| 1,753
| 2,131
| 2,602
| 2,947
| 3,286
| 3,733
| 4,073
| 16
| 0,690
| 1,337
| 1,746
| 2,120
| 2,583
| 2,921
| 3,252
| 3,686
| 4,015
| 17
| 0,689
| 1,333
| 1,740
| 2,110
| 2,567
| 2,898
| 3,222
| 3,646
| 3,965
| 18
| 0,688
| 1,330
| 1,734
| 2,101
| 2,552
| 2,878
| 3,197
| 3,610
| 3,922
| 19
| 0,688
| 1,328
| 1,729
| 2,093
| 2,539
| 2,861
| 3,174
| 3,579
| 3,883
| 20
| 0,687
| 1,325
| 1,725
| 2,086
| 2,528
| 2,845
| 3,153
| 3,552
| 3,850
| 21
| 0,686
| 1,323
| 1,721
| 2,080
| 2,518
| 2,831
| 3,135
| 3,527
| 3,819
| 22
| 0,686
| 1,321
| 1,717
| 2,074
| 2,508
| 2,819
| 3,119
| 3,505
| 3,792
| 23
| 0,685
| 1,319
| 1,714
| 2,069
| 2,500
| 2,807
| 3,104
| 3,485
| 3,768
| 24
| 0,685
| 1,318
| 1,711
| 2,064
| 2,492
| 2,797
| 3,091
| 3,467
| 3,745
| 25
| 0,684
| 1,316
| 1,708
| 2,060
| 2,485
| 2,787
| 3,078
| 3,450
| 3,725
| 26
| 0,684
| 1,315
| 1,706
| 2,056
| 2,479
| 2,779
| 3,067
| 3,435
| 3,707
| 27
| 0,684
| 1,314
| 1,703
| 2,052
| 2,473
| 2,771
| 3,057
| 3,421
| 3,690
| 28
| 0,683
| 1,313
| 1,701
| 2,048
| 2,467
| 2,763
| 3,047
| 3,408
| 3,674
| 29
| 0,683
| 1,311
| 1,699
| 2,045
| 2,462
| 2,756
| 3,038
| 3,396
| 3,659
| 30
| 0,683
| 1,310
| 1,697
| 2,042
| 2,457
| 2,750
| 3,030
| 3,385
| 3,646
| 31
| 0,682
| 1,309
| 1,696
| 2,040
| 2,453
| 2,744
| 3,022
| 3,375
| 3,633
| 32
| 0,682
| 1,309
| 1,694
| 2,037
| 2,449
| 2,738
| 3,015
| 3,365
| 3,622
| 33
| 0,682
| 1,308
| 1,692
| 2,035
| 2,445
| 2,733
| 3,008
| 3,356
| 3,611
| 34
| 0,682
| 1,307
| 1,691
| 2,032
| 2,441
| 2,728
| 3,002
| 3,348
| 3,601
| 35
| 0,682
| 1,306
| 1,690
| 2,030
| 2,438
| 2,724
| 2,996
| 3,340
| 3,591
| 36
| 0,681
| 1,306
| 1,688
| 2,028
| 2,434
| 2,719
| 2,990
| 3,333
| 3,582
| 37
| 0,681
| 1,305
| 1,687
| 2,026
| 2,431
| 2,715
| 2,985
| 3,326
| 3,574
| 38
| 0,681
| 1,304
| 1,686
| 2,024
| 2,429
| 2,712
| 2,980
| 3,319
| 3,566
| 39
| 0,681
| 1,304
| 1,685
| 2,023
| 2,426
| 2,708
| 2,976
| 3,313
| 3,558
| 40
| 0,681
| 1,303
| 1,684
| 2,021
| 2,423
| 2,704
| 2,971
| 3,307
| 3,551
| |