Give an example of a research problem or question that would be investigated using a physiologic instrument? 

physiologic instruments are the instruments that a researcher uses to collect data about the participant. for instance a researcher is to determine the consistence of a machine that is parking drugs, then the machine is a physiologic instrument. the researcher may be concerned to know the consistence of the machine in parking and he/she decides to pick a bottle of drug packed after every 10 minutes and record whether it is above, below or equal to the set amount this is possible for quality control in order to avoid so much over and under packaging. here the research question will be, is the machine consistence in its packing? this may be solved using a non parametric inferential method where the researcher will carry a test for randomness.