Someone whose true blood glucose level is 1000mg/do has their blood gluecose tes

Question

Someone whose true blood glucose level is 1000mg/do has their blood gluecose tested 3 times. These measurements are 80,81, and 80. The machine used to measure blood glucose can be considered:
A. Valid but not reliable B.not valid or reliable C.valud and precise D.reliable but not valid ? Someone whose true blood glucose level is 1000mg/do has their blood gluecose tested 3 times. These measurements are 80,81, and 80. The machine used to measure blood glucose can be considered:
A. Valid but not reliable B.not valid or reliable C.valud and precise D.reliable but not valid ?
A. Valid but not reliable B.not valid or reliable C.valud and precise D.reliable but not valid ?

Explanation / Answer

Ans:

As,3 measurements taken by machine are much lower than true value of blood glucose level,so it can not be valid machine.

But,as mearements are in a narrow range,so machine is reliable.

Option D is correct(Reliable but not valid)

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