Chemistry Department
North Carolina State University

Student's t-Table

df

80%

90%

95%

99%

1

3.078

6.314

12.706

63.657

2

1.886

2.920

4.303

9.925

3

1.638

2.353

3.182

5.841

4

1.533

2.132

2.776

4.604

5

1.476

2.015

2.571

4.032

6

1.440

1.943

2.447

3.707

7

1.415

1.895

2.365

3.500

8

1.397

1.860

2.306

3.355

9

1.383

1.833

2.262

3.250

10

1.372

1.812

2.228

3.169

11

1.363

1.796

2.201

3.106

12

1.356

1.782

2.179

3.055

13

1.350

1.771

2.160

3.012

14

1.345

1.761

2.145

2.977

15

1.341

1.753

2.131

2.947

df

80%

90%

95%

99%

16

1.337

1.746

2.120

2.921

17

1.333

1.740

2.110

2.898

18

1.330

1.734

2.101

2.878

19

1.328

1.729

2.093

2.861

20

1.325

1.725

2.086

2.845

21

1.323

1.721

2.080

2.831

22

1.321

1.717

2.074

2.819

23

1.319

1.714

2.069

2.807

24

1.318

1.711

2.064

2.797

25

1.316

1.708

2.060

2.787

26

1.315

1.706

2.056

2.779

27

1.314

1.703

2.052

2.771

28

1.313

1.701

2.048

2.763

29

1.311

1.699

2.045

2.756

30

1.310

1.697

2.042

2.750

df

80%

90%

95%

99%

infinity

1.282

1.645

1.96

2.576


W. L. Switzer
Chemistry-8204
North Carolina State University
Raleigh NC 27695