The value in the table is the right tail probability

a

n

0.5

0.25

0.1

0.05

0.025

0.005

1

0.455

1.323

2.706

3.841

5.024

7.879

2

1.386

2.773

4.605

5.991

7.378

10.597

3

2.366

4.108

6.251

7.815

9.348

12.838

4

3.357

5.385

7.779

9.488

11.143

14.860

5

4.351

6.626

9.236

11.070

12.832

16.750

6

5.348

7.841

10.645

12.592

14.449

18.548

7

6.346

9.037

12.017

14.067

16.013

20.278

8

7.344

10.219

13.362

15.507

17.535

21.955

9

8.343

11.389

14.684

16.919

19.023

23.589

10

9.342

12.549

15.987

18.307

20.483

25.188

11

10.341

13.701

17.275

19.675

21.920

26.757

12

11.340

14.845

18.549

21.026

23.337

28.300

13

12.340

15.984

19.812

22.362

24.736

29.819

14

13.339

17.117

21.064

23.685

26.119

31.319

15

14.339

18.245

22.307

24.996

27.488

32.801

16

15.338

19.369

23.542

26.296

28.845

34.267

17

16.338

20.489

24.769

27.587

30.191

35.718

18

17.338

21.605

25.989

28.869

31.526

37.156

19

18.338

22.718

27.204

30.144

32.852

38.582

20

19.337

23.828

28.412

31.410

34.170

39.997

21

20.337

24.935

29.615

32.671

35.479

41.401

22

21.337

26.039

30.813

33.924

36.781

42.796

23

22.337

27.141

32.007

35.172

38.076

44.181

24

23.337

28.241

33.196

36.415

39.364

45.558

25

24.337

29.339

34.382

37.652

40.646

46.928

26

25.336

30.435

35.563

38.885

41.923

48.290

27

26.336

31.528

36.741

40.113

43.195

49.645

28

27.336

32.620

37.916

41.337

44.461

50.994

29

28.336

33.711

39.087

42.557

45.722

52.335

30

29.336

34.800

40.256

43.773

46.979

53.672

40

39.335

45.616

51.805

55.758

59.342

66.766

50

49.335

56.334

63.167

67.505

71.420

79.490

60

59.335

66.981

74.397

79.082

83.298

91.952

70

69.334

77.577

85.527

90.531

95.023

104.215

80

79.334

88.130

96.578

101.879

106.629

116.321

90

89.334

98.650

107.565

113.145

118.136

128.299

100

99.334

109.141

118.498

124.342

129.561

140.170

120

119.334

130.055

140.233

146.567

152.211

163.648

                                            

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