Appendix 1

A1.1 Two-Tailed t-Table

Probability points of the t-distribution with degrees of freedom (df) (Continued)

df

Two-Tail Area Probability

0.2

0.1

0.05

0.01

0.005

0.001

1

3.078

6.314

12.706

63.657

127.321

636.619

2

1.886

2.920

4.303

9.925

14.089

31.599

3

1.638

2.353

3.182

5.841

7.453

12.924

4

1.533

2.132

2.776

4.604

5.598

8.610

5

1.476

2.015

2.571

4.032

4.773

6.869

6

1.440

1.943

2.447

3.707

4.317

5.959

7

1.415

1.895

2.365

3.499

4.029

5.408

8

1.397

1.860

2.306

3.355

3.833

5.041 ...

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