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

126 BIOLOGICAL EFFECTS OF LOW LEVEL EXPOSURES

Table 7.3. Probability of Observing a Significantly Lower Risk in the Exposed Group, by Sample Size, Risk for Exposed Group, and Risk for

Comparison Group

pjsk for

Risk for Comparison Group

Exposed Group

(T05

(U 0

CL15

CL20

(L25

CL30

(L35

0^40

<M5

(L50

A. Sample Size = 25 in Each Group

0.50

0 0

0000

0012

0.45

0 0

0000

0124

0.40

0 0

0000

1

148

0.35

0 0

0000

1

37

14

0.30

0 0

0001

3

7

13

23

0.25

0

0

0

0

1

3

6

13

23

36

0.20

0

0

0

1

3

6

13

23

36

51

0.15

0

0

1

2

6

14

24

38

53

67

0.10

0

0

2

6

15

27

42

57

72

83

0.05

0

1

6

16

31

49

66

79

89

95

B. Sample Size = 50 in Each Group

0.50

0 0

0000

0002

0.45

0 0

0000

0025

0.40

0 0

0000

025

13

0.35

0 0

0000

25

13

27

0.30

0

0

0

0

0

2

5

13

27

46

0.25

0

0

0

0

2

5

14

29

48

67

0.20

0

0

0

1

6

15

32

52

71

85

0.15

0

0

1

6

17

35

57

76

89

96

0.10

0

1

6

19

41

64

82

93

98

99

0.05

0

6

24

51

75

90

97

99

100

100