LMP299Y1 Lecture Notes - Lecture 3: Statistical Process Control, Analyte, Viscosity
20 Jan 2015
School
Department
Course
Professor
Document Summary
Ideal methods need little or no sample the sample must be easily obtained give results instantly cost nothing to do accurate precise free from interference appropriate range for measurement sensitive for low concentrations. Measurements can be imprecise, precise but inaccurate (bias, off the mark), or precise and accurate (ideal) Must also consider, is this change over a time span of a week, month, year the time span would factor in. Test interpretation test results vs. a gold standard. Disease is absent false positive true negative false negative test missed the disease very important concepts affects test interpretation there is frequently a number of diseases that overlap cutoffs can test a false positive or negative. Interpreting disease clinical sensitivity the ability of a test to detect a disease when the disease is present. = true positives / (true positives + false negatives) = true negatives / (true negatives + false positives)
