Question

What is the accuracy of measurement for the classification of responses?

(a) 1-2%

(b) 2-3%

(c) 3-4%

(d) 4-5%

This question was addressed to me during a job interview.

The origin of the question is Exercise Stress Testing in section Arrhythmia and Ambulatory Monitoring Instruments of Biomedical Instrumentation

Answer 1

Correct answer is (b) 2-3%

The explanation: Cardiotocographs are designed to measure and record foetal heart rate on a beat-to-beat basis rather than on an average basis. Normally, accuracy of measurement may be 2–3% for the classification of responses.