Reliability, Maintainability and Risk: Practical Methods for Engineers, Seventh Edition

Appendix 2: Percentage Points of the Chi-Square Distribution

?

0.9995

0.999

0.995

0.990

0.975

0.95

0.90

0.80

0.70

0.60

n

1

0.0 6393

0.0 5157

0.0 4393

0.0 3157

0.0 3982

0.0 2393

0.0158

0.0642

0.148

0.275

2

0.0 2100

0.0 2200

0.0100

0.0201

0.0506

0.103

0.211

0.446

0.713

1.02

3

0.0153

0.0243

0.0717

0.115

0.216

0.352

0.584

1.00

1.42

1.87

4

0.0639

0.0908

0.207

0.297

0.484

0.711

1.06

1.65

2.19

2.75

5

0.158

0.210

0.412

0.554

0.831

1.15

1.61

2.34

3.00

3.66

6

0.299

0.381

0.676

0.872

1.24

1.64

2.20

3.07

3.83

4.57

7

0.485

0.598

0.989

1.24

1.69

2.17

2.83

3.82

4.67

5.49

8

0.710

0.857

1.34

1.65

2.18

2.73

3.49

4.59

5.53

6.42

9

0.972

1.15

1.73

2.09

2.70

3.33

4.17

5.38

6.39

7.36

10

1.26

1.48

2.16

2.56

3.25

3.94

4.87

6.18

7.27

8.30

11

1.59

1.83

2.60

3.05

3.82

4.57

5.58

6.99

8.15

9.24

12

1.93

2.21

3.07

3.57

4.40

5.23

6.30

7.81

9.03

10.2

13

2.31

2.62

3.57

4.11

5.01

5.89

7.04

8.63

9.93

11.1

14

2.70

3.04

4.07

4.66

5.63

6.57

7.79

9.47

10.8

12.1

15

3.11

3.48

4.60

5.23

6.26

7.26

8.55

10.3

11.7

13.0

16

3.54

3.94

5.14

5.81

6.91

7.96

9.31

11.2

12.6

14.0

17

3.98

4.42

5.70

6.41

7.56

8.67

10.1

12.0

13.5

14.9

18

4.44

4.90

6.26

7.01

8.23

9.39

10.9

12.9

14.4

15.9

19

4.91

5.41

6.84

7.63

8.91

10.0

11.7

13.7

15.4

16.9

20

5.40

5.92

7.43

8.26

9.59

10.9

12.4

14.6

16.3

17.8

21

5.90

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