Critical values for correlation coefficient r

(from Sokal & Rohlf)

Warning-all rights reserved by the publisher

This table is supplied as student information only

v = n-2

n is the sample size (number of pairs of variates)

v

a

1

2

3

4

v

a

1

2

3

4

v

a

1

2

3

4

1

.05

.997

.999

.999

.999

16

.05

.468

.559

.615

.655

35

.05

.325

.397

.445

.482

.01

1,000

1,000

1,000

1,000

.01

.590

.662

.706

.738

.01

.418

.481

.523

.556

2

.05

.950

.975

.983

.987

17

.05

.456

.545

.601

.641

40

.05

.304

.373

.419

.455

.01

.990

.995

.997

.998

.01

.575

.647

.691

.724

.01

.393

.454

.494

.526

3

.05

.878

.930

.950

.961

18

.05

.444

.532

.587

.628

45

.05

.288

.353

.397

.432

.01

.959

.976

.983

.987

.01

.561

.633

.678

.710

.01

.372

.430

.470

.501

4

.05

.811

.881

.912

.930

19

.05

.433

.520

.575

.615

50

.05

.273

.336

.379

.412

.01

.917

.949

.962

.970

.01

.549

.620

.665

.698

.01

.354

.410

.449

.479

5

.05

.754

.836

.874

.898

20

.05

.423

.509

.563

.604

60

.05

.250

.308

.348

.380

.01

.874

.917

.937

.949

.01

.537

.608

.652

.685

.01

.325

.377

.414

.442

6

.05

.707

.795

.839

.867

21

.05

.413

.498

.522

.592

70

.05

.232

.286

.324

.354

.01

.834

.886

.911

.927

.01

.526

.596

.641

.674

.01

.302

351

.386

.413

7

.05

.666

.758

.807

.838

22

.05

.404

.488

.542

.582

80

.05

.217

.269

.304

.332

.01

.798

.855

.885

.904

.01

.515

.585

.630

.663

.01

.283

.330

.362

.389

8

.05

.632

.726

.777

.811

23

.05

.396

.479

.532

.572

90

.05

.205

.254

.288

.315

.01

.765

.827

.860

.882

.01

.505

.574

.619

.652

.01

.267

.312

.343

.368

9

.05

.602

.697

.750

.786

24

.05

.388

.470

.523

.562

100

.05

.195

.241

.274

.300

.01

.735

.800

.836

.861

.01

.496

.565

.609

.642

.01

.254

.297

.327

.351

10

.05

.576

.671

.726

.763

25

.05

.381

.462

.514

.553

125

.05

.174

.216

.246

.269

.01

.708

.776

.814

.840

.01

.487

.555

.600

.633

.01

.228

.266

.294

.316

11

.05

.553

.648

.703

.741

26

.05

.374

.454

.506

.545

150

.05

.159

.198

.225

.247

.01

.684

.753

.793

.821

.01

.478

.546

.590

.624

.01

.208

.244

.270

.290

12

.05

.532

.627

.683

.722

27

.05

.367

.446

.498

.536

200

.05

.138

.172

.196

.215

.01

.661

.732

.773

.802

.01

.470

.538

.582

.615

.01

.181

.212

.234

.253

13

.05

.514

.608

.664

.703

28

.05

.361

.439

.490

.529

300

.05

.113

.141

.160

.176

.01

.641

.712

.755

.785

.01

.463

.530

.573

.606

.01

.148

.174

.192

.208

14

.05

.497

.590

.646

.686

29

.05

.355

.432

.482

.521

400

.05

.098

.122

.139

.153

.01

.623

.694

.737

.768

.01

.456

.522

.565

.598

.01

.128

.151

.167

.180

15

.05

.482

.574

.630

.670

30

.05

.349

.426

.476

.514

500

.05

.088

.109

.124

.137

.01

.606

.677

.721

.752

.01

.449

.514

.558

.591

.01

.115

.135

.150

.162

1000

.05

.062

.077

.088

.097

.01

.081

.096

.106

.115