WGU D910 DATA ANALYSIS FOR HEALTHCARE DECISIONS
EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS
WITH RATIONALES || 100% GUARANTEED PASS!!
<LATEST VERSION>
Question 1
A health system wants to determine whether patients discharged from its cardiac
service experience different 30-day readmission rates based on whether they
received a pharmacist-led medication reconciliation. Investigators identify patients
who received the service and a comparable group who did not, then review
subsequent readmissions.
Which research design is most appropriate for this investigation?
A. Cross-sectional study
B. Cohort study
C. Case-control study
D. Ecological study
Answer: B
Rationale: A cohort study follows groups defined by an exposure or intervention
and examines subsequent outcomes. Here, patients are grouped according to
medication-reconciliation exposure and then evaluated for later readmission.
,Question 2
A hospital's analytics team reports the following emergency department visit
counts for the previous six months:
Month Visits
January 4,820
February 4,760
March 4,910
April 5,105
May 5,240
June 5,390
The chief operating officer asks, "What has happened to emergency department
volume during this period?"
Which analytics approach directly answers the question?
A. Predictive analytics
B. Prescriptive analytics
C. Descriptive analytics
D. Diagnostic analytics
Answer: C
Rationale: Descriptive analytics summarizes historical data to explain what has
occurred. The monthly visit counts provide a historical description of ED volume
and its observed trend.
,Question 3
A population-health researcher investigates whether adults with hypertension have
a higher prevalence of uncontrolled blood pressure than adults without
hypertension. Participants' clinical information is collected during one clinic visit,
and exposure and outcome are measured at the same point in time.
Which study design is being used?
A. Cohort
B. Randomized controlled trial
C. Cross-sectional
D. Case-control
Answer: C
Rationale: A cross-sectional study provides a snapshot of a population at a
particular point in time. Exposure and outcome are measured simultaneously rather
than followed prospectively.
Question 4
A nurse manager notices that one automated blood-pressure device consistently
records systolic pressures approximately 8 mmHg higher than a calibrated
reference device. The discrepancy occurs across multiple patients.
Which type of bias is most directly represented?
A. Recall bias
B. Selection bias
C. Measurement bias
D. Nonresponse bias
Answer: C
Rationale: Measurement bias occurs when the method or instrument used to
collect data systematically produces inaccurate measurements. An improperly
calibrated device can distort values across observations.
, Question 5
A hospital surveys patient satisfaction by distributing questionnaires only to
individuals who attend its downtown outpatient facility. The organization then uses
the findings to represent satisfaction among patients across the entire regional
service area, including rural residents.
Which concern is most important?
A. Selection bias
B. Recall bias
C. Observer bias
D. Random measurement error
Answer: A
Rationale: Selection bias occurs when the individuals included in a sample differ
systematically from the target population. Excluding rural patients from the
sampling process may make the respondents unrepresentative of the full regional
population.
Question 6
Patients discharged after treatment for pneumonia are asked three months later how
many doses of antibiotics they missed during the previous hospitalization. Some
patients cannot accurately remember their medication-taking behavior.
Which bias is most likely to affect these data?
A. Selection bias
B. Recall bias
C. Confirmation bias
D. Sampling-frame bias
Answer: B
Rationale: Recall bias arises when participants inaccurately remember past events
or behaviors. The three-month delay increases the likelihood that patients will
misreport missed doses.
EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS
WITH RATIONALES || 100% GUARANTEED PASS!!
<LATEST VERSION>
Question 1
A health system wants to determine whether patients discharged from its cardiac
service experience different 30-day readmission rates based on whether they
received a pharmacist-led medication reconciliation. Investigators identify patients
who received the service and a comparable group who did not, then review
subsequent readmissions.
Which research design is most appropriate for this investigation?
A. Cross-sectional study
B. Cohort study
C. Case-control study
D. Ecological study
Answer: B
Rationale: A cohort study follows groups defined by an exposure or intervention
and examines subsequent outcomes. Here, patients are grouped according to
medication-reconciliation exposure and then evaluated for later readmission.
,Question 2
A hospital's analytics team reports the following emergency department visit
counts for the previous six months:
Month Visits
January 4,820
February 4,760
March 4,910
April 5,105
May 5,240
June 5,390
The chief operating officer asks, "What has happened to emergency department
volume during this period?"
Which analytics approach directly answers the question?
A. Predictive analytics
B. Prescriptive analytics
C. Descriptive analytics
D. Diagnostic analytics
Answer: C
Rationale: Descriptive analytics summarizes historical data to explain what has
occurred. The monthly visit counts provide a historical description of ED volume
and its observed trend.
,Question 3
A population-health researcher investigates whether adults with hypertension have
a higher prevalence of uncontrolled blood pressure than adults without
hypertension. Participants' clinical information is collected during one clinic visit,
and exposure and outcome are measured at the same point in time.
Which study design is being used?
A. Cohort
B. Randomized controlled trial
C. Cross-sectional
D. Case-control
Answer: C
Rationale: A cross-sectional study provides a snapshot of a population at a
particular point in time. Exposure and outcome are measured simultaneously rather
than followed prospectively.
Question 4
A nurse manager notices that one automated blood-pressure device consistently
records systolic pressures approximately 8 mmHg higher than a calibrated
reference device. The discrepancy occurs across multiple patients.
Which type of bias is most directly represented?
A. Recall bias
B. Selection bias
C. Measurement bias
D. Nonresponse bias
Answer: C
Rationale: Measurement bias occurs when the method or instrument used to
collect data systematically produces inaccurate measurements. An improperly
calibrated device can distort values across observations.
, Question 5
A hospital surveys patient satisfaction by distributing questionnaires only to
individuals who attend its downtown outpatient facility. The organization then uses
the findings to represent satisfaction among patients across the entire regional
service area, including rural residents.
Which concern is most important?
A. Selection bias
B. Recall bias
C. Observer bias
D. Random measurement error
Answer: A
Rationale: Selection bias occurs when the individuals included in a sample differ
systematically from the target population. Excluding rural patients from the
sampling process may make the respondents unrepresentative of the full regional
population.
Question 6
Patients discharged after treatment for pneumonia are asked three months later how
many doses of antibiotics they missed during the previous hospitalization. Some
patients cannot accurately remember their medication-taking behavior.
Which bias is most likely to affect these data?
A. Selection bias
B. Recall bias
C. Confirmation bias
D. Sampling-frame bias
Answer: B
Rationale: Recall bias arises when participants inaccurately remember past events
or behaviors. The three-month delay increases the likelihood that patients will
misreport missed doses.
