Free RPFT Web TestEngine Demo

Q14 Single choice

A pulmonary function laboratory routinely tests five subjects as biologic controls. Acceptable instrument performance over time is indicated when measurements

A
For each individual are within 2 standard deviations of the mean of previous measurements for each individual.
B
For an individual are within 2 standard deviations of the mean of those for the group.
C
Of the group as a whole agree with those predicted by linear regression for changes in age.
D
Are within the 95% confidence interval predicted for an individual being tested.

RPFT Web TestEngine demo