1. A Note on G.S. Watson's Paper 'A Study of the Group Screening Method".
- Author
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Gurnow, R.N.
- Subjects
PROBABILITY theory ,CAUSATION (Philosophy) ,MATHEMATICAL models - Abstract
In a paper in this Journal, Watson (1961) has discussed the use of group screening methods for detecting effective factors. The methods are analogous to those suggested by Doff man (1943) for the medical problem of detecting a rare defect among members of a large population by using pooled blood samples. One step in Watson's derivation of the probability that an effective factor is declared significant is invalid. The purpose of this note is to derive the correct expression for this probability and show how the correction affects the subsequent theory. None of Watson's qualitative statements about the efficiency of group screening methods nor his numerical example are seriously affected. [ABSTRACT FROM AUTHOR]
- Published
- 1965
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