NURS 5366 COMPREHENSIVE QUESTIONS AND ANSWERS SET A.pdf

NURS 5366 COMPREHENSIVE QUESTIONS AND
ANSWERS SET A+
✔✔Probability Distribution - ✔✔graphs possible outcomes---NOT frequency of possible
outcomes

✔✔Z-Score - ✔✔

✔✔Z-score Example - ✔✔

✔✔ - ✔✔

✔✔Chapter 4
Evaluating your Measurement Tool - ✔✔

✔✔Feasibility of a tool/study - ✔✔

✔✔Validity - ✔✔

✔✔Content Validity - ✔✔

✔✔Convergent validity - ✔✔

✔✔Divergent validity - ✔✔

✔✔Validity from contrasting groups: - ✔✔

✔✔Validity from prediction of future/concurrent events: - ✔✔

✔✔Reliability - ✔✔

✔✔Homogeneity - ✔✔

, ✔✔Stability - ✔✔

✔✔Equivalence - ✔✔

✔✔Readability - ✔✔

✔✔Remember: - ✔✔Instrument:
if not reliable it can be valid
but...can not be valid if not reliable
- must be both valid and reliable to accurately measure a concept
-Validity and reliability reflect use with a particular group at a particular time

✔✔Sensitivity, specificity and positive and negative predictive value - ✔✔

✔✔Accuracy of a Screening Test: - ✔✔- can it correctly assess disease or condition of
being present or absent?
- if test is positive- what probability that dz is present?
- if negative - what probability dz not present ?

✔✔Possible results of screening test: - ✔✔-true positive
-false positive- test
- true negative
-false negative-test

✔✔2 x 2 TABLE - ✔✔

✔✔Sensitivity - ✔✔probability pt with dz will test positive for it.

✔✔High Sensitive Test - ✔✔-excellent at identifying if pt has dz
- hardly any false negatives
-important for early tx of fatal dz

✔✔Specificity - ✔✔- prob. that pt without dz will test negative

✔✔High Specificity Test - ✔✔-excellent in identifying if the pt doesn't have the dz
-hardly any false positives

✔✔Positive Predictive Value (PPV): - ✔✔- pt probably actually has dz


****depends on prevalence***

✔✔Prevalence - ✔✔- how many people have dz in pop.