Revival: Biological Effects of Low Level Exposures to Chemical and Radiation (1992)

128 BIOLOGICAL EFFECTS OF LOW LEVEL EXPOSURES

Table 7.4. Probability of Observing a Significantly Lower Risk in the Exposed Group, by Sample Size, Risk for Exposed Group, and Risk for

Comparison Group

Plsk fQr

Risk for Comparison Group

Exposed Group

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

A. Sample Size

=

25

in Each Group

0.50

0 0

0000

01

13

0.45

0

0

0000

0137

0.40

0

0

0000

1

37

13

0.35

0

0

0001

3

6

12

21

0.30

0

0

0

0

1

3

6

12

21

33

0.25

0

0

0

1

3

6

12

21

34

48

0.20

0

0

1

2

6

13

23

35

49

64

0.15

0

0

2

6

13

24

38

53

67

79

0.10

0

1

5

13

26

42

58

72

83

91

0.05

0

3

12

27

46

64

79

89

95

98

B. Sample Size

=

50

in Each Group

0.50

0

0

0

0

0

0

0

0

1

3

0.45

0

0

0000

0138

0.40 00

00001 38 1

9

0.35

0 0

0 0 0 1

39 20 36

0.30

0

0

0

0

1

3

10

21

38

57

0.25

0

0

0

1

3

9

22

41

61

78

0.20

0

0

1

3

10

23

42

64

81

92

0.15

0

0

3

11

26

46

67

84

94

98

0.10

0

2

12

31

54

75

89

96

99

100

0.05

1

13

39

66

85

95

99

100

100

100