AIIMS November 2011 – MCQ 169

Using a new technique, Hb was estimated in a blood sample. The test was repeated for 10 times. The reports were : 9.5, 9.2, 9.4, 9.6, 9.7, 9.9, 10.2, 10.3, 10.5, 12.1. Accurate value of Hb was estimated by standard tests to be 10.2. The new technique has
A. High validity and high reliability
B. Low validity and low reliability
C. High validity and low reliability
D. Low validity and high reliability

(Repeat question – AIIMS Nov 06 – AA q45)

Correct answer: B.Low validity and low reliability

Validity is a measure of accuracy of the result – the values obtained must be close to the actual value. Reliability is a measure of reliability – the values obtained must be close to each other)

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AIIMS November 2011 – MCQ 168

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