Table 5. Sample size calculation for the one-sided triangular test.
one-sided | two-sided | |||||||
Pa = 0.18 | Pa = 0.20 | Pa = 0.25 | Pa = 0.20 | |||||
Stage | N per group | Cumulated information Z statistic | N per group | Cumulated information Z statistic | N per group | Cumulated information Z statistic | N per group | Cumulated information Z statistic |
1 | 8 | 27 | 7 | 23 | 5 | 16 | 8 | 27 |
2 | 16 | 55 | 14 | 47 | 10 | 31 | 16 | 53 |
3 | 24 | 82 | 20 | 67 | 14 | 44 | 24 | 80 |
4 | 32 | 110 | 27 | 90 | 19 | 60 | 32 | 107 |
5 | 40 | 137 | 34 | 113 | 23 | 72 | 40 | 133 |
6 | 48 | 165 | 40 | 133 | 28 | 88 | 48 | 160 |
7 | 56 | 192 | 47 | 157 | 32 | 101 | 56 | 187 |
8 | 64 | 220 | 54 | 180 | 37 | 117 | 64 | 213 |
9 | 72 | 247 | 60 | 200 | 41 | 129 | 72 | 240 |
10 | 80 | 274 | 67 | 223 | 46 | 145 | 79 | 263 |
pa = 0.18, 0.20 and 0.25; and two-sided test, pa = 0.20.