From: Interim analyses of data as they accumulate in laboratory experimentation
No. of interim analyses (k) | Nominal critical Pvalue | Adjusted critical Pvalue | |
---|---|---|---|
 |  | (Šidák) | (Armitage-McPherson) |
1 | 0.05 | 0.050 | 0.050 |
2 | 0.05 | 0.025 | 0.030 |
5 | 0.05 | 0.010 | 0.016 |
10 | 0.05 | 0.005 | 0.011 |
20 | 0.05 | 0.003 | 0.008 |