CRITICALVALUESOFT

(Cont'd)

Level of significance for one-tailedtest
.05.025.01

Level of significance for two-tailed test
.10.05.02

.10

.005

.0005

df 16 17 18 19 20

21 22 23 24 25

.20

.01

.001 4.015 3.965 3.922 3.883 3.850

3.819 3.792 3.767 3.745 3.725

1.337 1.333 1.330 1.328 1.325

1.323 1.321 1.319 1.318 1.316

1.746 1.740 1.734 1.729 1.725

1.721 1.717 1.714 1.711 1.708

2.120 2.110 2.101 2.093 2.080

2.080 2.074 2.069 2.064 2.060

2.583 2.567 2.552 2.539 2.528

2.518 2.508 2.500 2.492 2.485

2.921 2.898 2.878 2.861 2.845

2.831 2.819 2.807 2.797 2.787