BIOSTATS - COMLEX LEVEL II
QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
SD distributions
1? 2? 3? Between 1 & 2? - ANSWER 1 - 68% - 34% on each side of the median
2 - 95% - 47.5% "
3 - 99.7% - 49.4% "
-Between 1 & 2 = 47.5% - 34% = 13.5% -> 14% (rounded up)
Sensitivity = - ANSWER TP/TP +FN
Specificity = - ANSWER TN/TN +FP
If a screening test is developed to screen donated blood for Hep B (or any other blood borne pathogen),
would it be better for the test to be highly specific or highly sensitive? Why? - ANSWER Sensitive,
because when dealing with blood borne pathogens it is better to discard blood that may not be infected
(FP) than to give a person blood that could be infected (FN)
PPV = - ANSWER TP/TP + FP
NNV = - ANSWER TN/TN + FN
QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
SD distributions
1? 2? 3? Between 1 & 2? - ANSWER 1 - 68% - 34% on each side of the median
2 - 95% - 47.5% "
3 - 99.7% - 49.4% "
-Between 1 & 2 = 47.5% - 34% = 13.5% -> 14% (rounded up)
Sensitivity = - ANSWER TP/TP +FN
Specificity = - ANSWER TN/TN +FP
If a screening test is developed to screen donated blood for Hep B (or any other blood borne pathogen),
would it be better for the test to be highly specific or highly sensitive? Why? - ANSWER Sensitive,
because when dealing with blood borne pathogens it is better to discard blood that may not be infected
(FP) than to give a person blood that could be infected (FN)
PPV = - ANSWER TP/TP + FP
NNV = - ANSWER TN/TN + FN
