4 ms·
If B2 and D4 are positive, then in the marginals B,D,2,4 will show positive, but you don't know which of B2, B4, D2, D4 are positive.
by sampo 7y ago
If B2 and D4 are positive, then in the marginals B,D,2,4 will show positive, but you don't know which of B2, B4, D2, D4 are positive.
- danieltillett 7y agoYes that is true, but when the case rate is low this is not a common problem. The ideal size of the grid is adjusted to expected case rate. If you get ambiguity then you just move those samples across to a new grid (in locations that won’t be ambiguous) and test again.