<prompt> ECG was performed on a total of 700 subjects with complaints of acute chest pain. Of these, 520 patients had myocardial infarction. Calculate the specificity of ECG: MYOCARDIAL INFARCTION ECG PRESENT ABSENT TOTAL POSITIVE 416 9 425 NEGATIVE 104 171 275 TOTAL 520 180 70020558095  <response>: Specificitytrue negativetrue negative false positive 171180 x 100 95 Ref: Medical biostatistics, 1st edition pg: 199 