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Table 8 Minimum sample sizes as the function of difference (denoted by Δ) for the 4 baseline question SSC model

From: New non-randomised model to assess the prevalence of discriminating behaviour: a pilot study on mephedrone

 

Prevalence Rate

 

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

 

Standard Deviation (s)

 

1.022

1.043

1.063

1.080

1.092

1.104

1.112

1.118

1.118

1.121

Effect Size (Δ)

Minimum Sample Size (n)

0.01

28247

29421

30566

31563

32251

32975

33479

33799

33823

33993

0.02

7062

7355

7641

7891

8063

8244

8370

8450

8456

8498

0.03

3139

3269

3396

3507

3583

3664

3720

3755

3758

3777

0.04

1765

1839

1910

1973

2016

2061

2092

2112

2114

2125

0.05

1130

1177

1223

1263

1290

1319

1339

1352

1353

1360

0.1

282

294

306

316

323

330

335

338

338

340

0.15

126

131

136

140

143

147

149

150

150

151

0.2

71

74

76

79

81

82

84

84

85

85

0.25

45

47

49

51

52

53

54

54

54

54

0.3

31

33

34

35

36

37

37

38

38

38

0.35

23

24

25

26

26

27

27

28

28

28

0.4

18

18

19

20

20

21

21

21

21

21

0.45

14

15

15

16

16

16

17

17

17

17

0.5

11

12

12

13

13

13

13

14

14

14