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.
Sometimes the data can be subjective and objective at the same time. Check out these examples of both subjective data (what the patient says) and objective data (what the nurse observes): A patient says she is shivering as the nurse observes her shaking in the chair.