Some of the most expensive fighters such as the US F-14 Tomcat, F-15 Eagle, F-22 Raptor and Russian Su-27 were employed as all-weather interceptors as well as air superiority fighter aircraft, while commonly developing air-to-ground roles late in their careers.
The health service measures that best predict subjective health status should be identifiable. Following her further degree in clinical epidemiology and biostatistics, her interest turned to the development of methods to measure subjective health status.
OBJECTIVE VS. SUBJECTIVE TESTING. The difference between objective and subjective testing is between methods of evaluating a test. Scoring is objective when no judgement on the part of the scorer is needed. Test items can be evaluated objectively if there is only one right answer and scorers can mark a test by following an answer key.