... signals International Convention Regulation IVI on Standards of Training, Navigational Certification and Watchkeeping, Watchkeeping for Seafarers, 1978 IMO Recommendations on Navigational Watchkeeping ... down in Chapter VIII of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978 as amended (See pages 213-14.) Mandatory standards regar...
Ngày tải lên: 27/06/2014, 17:20
20- Matching J Stuart & F Simón, 2005T Grein, 2006
... Selection of more than one control per case (1:n) • Frequency matching – Number of controls selected according to number of cases in categories of matching variable – Matching done by groups of subjects ... itself cannot be analysed Testing for interaction of matching variable possible 20 Why stratified analysis? • Matching eliminates the original confounding, but introduces another...
Ngày tải lên: 10/03/2015, 17:33
Ngày tải lên: 26/07/2015, 22:55