<prompt> For a screening test, 90 specificity means that 90 of non diseased persons will give a -True negative resultTrue positive resultFalse negative resultFalse positive result  <response>: a 90 specificity means that 90of the non diseased persons will give true negative result,10 of non diseased people screened by the test will be wrongly classified as ;;diseased when they are not. ref:park;s textbook of preventive and social medicine,22nd edition,pg no 131 