Table 5 Distribution of baseline (Round 1) water lead categories and spike detection on any of 15 rounds.
Prevalence of spike on Round 1 of sampling | Probability of upward transition | Spike detection on any round | Initial round of sampling sensitivity to spike detection | 50% sensitivity achieved by |
|---|---|---|---|---|
2% | Lower | 10.51% | 19.23% | Round 6 |
2% | Mid-range | 31.72% | 6.37% | Round 7 |
2% | Higher | 89.74 | 2.25% | Round 5 |
10% | Mid-range | 38.51% | 25.89% | Round 5 |
