Testing For Systematic Error
•Uerrors in testing that affect the performance or reliability of a procedure and may be constant or proportional:
•econstant systematic error (CE):
•eproportional systematic error (PE):
•aerror is consistently low or high by same amount and is independent of concentration.
•-interfering substances
•-instrument malfunction
•aerror is consistently low or high in proportion to concentration.
•-incorrect calibration