Use the report of statistical research to identify the following. ​a) whether it was an observational study or an experiment​ b) whether it was retrospective or prospective​ c) the subjects​ studied, and how they were selected​ d) the parameter of interest​ e) the nature and scope of the conclusion regarding what the results may or may not indicate In a test of 200 college students, those with high blood pressure did worse on tests of memory and reaction time than those with normal blood pressure.