For a standard normal random variable Z, use Table 4 of the Appendix to find a number zo such that a) P(Z ≤ zo ) = 0.5 b) P(Z ≤ zo ) = 0.8749 c) P(Z ≥ zo ) = 0.117

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For a standard normal random variable Z, use Table 4 of the Appendix to find a number zo such that

a) P(Z ≤ zo ) = 0.5

b) P(Z ≤ zo ) = 0.8749

c) P(Z ≥ zo ) = 0.117

Appendix Tables
771
Table 4
Critical Values of t
Degrees of
Freedom
to.050
to.025
to.010
to.005
to.100
12.706
31.821
63.657
3.078
6.314
4.303
6.695
9.925
1.886
2.920
2.
3
3.182
4.541
5.841
1.638
2.353
2.132
2.776
3.747
4.604
1.533
4.
2.015
2.571
3.365
4.032
1.476
5.
3.143
3.707
1.440
1.943
2.447
66
3.355
1.415
1.895
2.365
2.998
7.
968
2.821
1.397
1.860
2.306
8.
3.250
1.383
1.833
2.262
69
3.106
1.372
1.812
2.228
2.764
2.718
96
1.782
11
1.363
2.201
12
1.356
2.179
2.681
3.055
13
1.350
1.771
2.650
3.012
14
1.345
1.761
2.145
2.624
2.977
15
1.341
1.753
2.131
2.602
2.947
1.337
1.746
2.120
2.583
2.921
17
1.333
1.740
2.110
2.567
2.898
18
1.330
1.734
2.101
2.552
2.878
1.328
1.729
2.093
2.539
2.861
1.325
1.725
2.086
2.528
2.845
20
21
1.323
1.721
2.080
2.518
2.831
22
1.321
1.717
2.074
2.508
2.819
23
1.319
1.714
690
2.064
2.500
2.807
24
1.318
1.711
2.492
2.797
25
1.316
1.708
09
2.056
2.485
2.787
1.315
2.479
2.779
27
1.314
1.703
15 90
2.052
2.473
2.771
28
1.313
1.701
2.048
2.467
2.763
1.311
669
1.645
2.045
2.462
2.756
1.282
2.326
2.576
Source: From M. Merrington, "Table of Percentage Points of the t-Distribution." Biometrika, 32, 1941. p. 300, Reproduced by permission of the Biometrika
096
Trustees,
Transcribed Image Text:Appendix Tables 771 Table 4 Critical Values of t Degrees of Freedom to.050 to.025 to.010 to.005 to.100 12.706 31.821 63.657 3.078 6.314 4.303 6.695 9.925 1.886 2.920 2. 3 3.182 4.541 5.841 1.638 2.353 2.132 2.776 3.747 4.604 1.533 4. 2.015 2.571 3.365 4.032 1.476 5. 3.143 3.707 1.440 1.943 2.447 66 3.355 1.415 1.895 2.365 2.998 7. 968 2.821 1.397 1.860 2.306 8. 3.250 1.383 1.833 2.262 69 3.106 1.372 1.812 2.228 2.764 2.718 96 1.782 11 1.363 2.201 12 1.356 2.179 2.681 3.055 13 1.350 1.771 2.650 3.012 14 1.345 1.761 2.145 2.624 2.977 15 1.341 1.753 2.131 2.602 2.947 1.337 1.746 2.120 2.583 2.921 17 1.333 1.740 2.110 2.567 2.898 18 1.330 1.734 2.101 2.552 2.878 1.328 1.729 2.093 2.539 2.861 1.325 1.725 2.086 2.528 2.845 20 21 1.323 1.721 2.080 2.518 2.831 22 1.321 1.717 2.074 2.508 2.819 23 1.319 1.714 690 2.064 2.500 2.807 24 1.318 1.711 2.492 2.797 25 1.316 1.708 09 2.056 2.485 2.787 1.315 2.479 2.779 27 1.314 1.703 15 90 2.052 2.473 2.771 28 1.313 1.701 2.048 2.467 2.763 1.311 669 1.645 2.045 2.462 2.756 1.282 2.326 2.576 Source: From M. Merrington, "Table of Percentage Points of the t-Distribution." Biometrika, 32, 1941. p. 300, Reproduced by permission of the Biometrika 096 Trustees,
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