Western Governors University | C784 Applied Healthcare Statistics
WGU C784 Applied Healthcare Statistics
Objective Assessment Comprehensive
Examination 2026/2027 | Verified Questions
Western Governors University | C784 Applied Healthcare Statistics | University-Level Healthcare
Students
100 Verified Questions | 4 Core Domains | Academic Year 2026/2027
Prepared by
Western Governors University | C784 Applied Healthcare Statistics
Objective Assessment Comprehensive Examination Actual Exam | Academic Year
2026/2027
WGU C784 Applied Healthcare Statistics Objective Assessment Comprehensive Examination 2026/2027 | Verified Questions
,INTRODUCTION
This Objective Assessment Comprehensive Examination contains exactly 100 original verified questions
designed to reinforce the official Western Governors University C784 Applied Healthcare Statistics course
objectives for actual exam readiness and analytical proficiency, aligned to the 2026/2027 academic year.
The questions are organized across four core domains: Domain 1 – Descriptive Statistics and Data Types
(25 questions); Domain 2 – Probability and Distributions (25 questions); Domain 3 – Inferential
Statistics and Hypothesis Testing (25 questions); and Domain 4 – Healthcare Applications and Research
Interpretation (25 questions). Each question is accompanied by the correct answer and a detailed
rationale grounded in foundational healthcare statistics methodology, including principles drawn from
university-level biostatistics curricula and established textbooks such as Rosner’s Fundamentals of
Biostatistics and Sullivan’s Essentials of Biostatistics in Public Health. The content emphasizes conceptual
understanding, correct application of statistical procedures, and accurate interpretation of results in
clinical and public-health contexts.
ACTUAL QUESTIONS
Domain 1: Descriptive Statistics and Data Types
Question 1. A researcher records the blood pressure readings of 50 patients as continuous
values in mmHg. Which level of measurement best describes these data?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Correct Answer: D
Rationale: Blood pressure measured in mmHg has a true zero point (absence of pressure) and equal
intervals between values, making it a ratio-level measurement. Interval scales lack a true zero, while
nominal and ordinal scales are categorical or ranked without equal intervals.
Question 2. In a study of hospital length of stay, the mean is 5.2 days and the median is 4.0
days. What does this relationship suggest about the distribution of length of stay?
A. The distribution is approximately symmetric
B. The distribution is left-skewed
C. The distribution is right-skewed
D. The distribution is bimodal
Correct Answer: C
Rationale: When the mean exceeds the median, the distribution is typically right-skewed (positively
skewed) because extreme high values pull the mean upward. Length of stay data commonly exhibit right
skew due to a minority of patients with prolonged hospitalizations.
Question 3. Which measure of central tendency is most appropriate for summarizing a set
of ordinal pain scores ranging from 1 (no pain) to 10 (worst pain)?
A. Mean
B. Mode
C. Median
D. Geometric mean
Correct Answer: B
Rationale: Ordinal data have ranked categories without equal intervals, so the median is the preferred
measure of central tendency. The mean assumes interval or ratio properties and can be misleading with
ordinal scales; the mode may not capture the central location effectively.
WGU C784 Applied Healthcare Statistics Objective Assessment Comprehensive Examination 2026/2027 | Verified Questions
, Question 4. A dataset of patient ages has a variance of 64 years squared. What is the
standard deviation?
A. 4 years
B. 8 years
C. 16 years
D. 32 years
Correct Answer: C
Rationale: The standard deviation is the square root of the variance. The square root of 64 is 8, so the
standard deviation is 8 years. Variance is expressed in squared units while standard deviation returns
to the original units of measurement.
Question 5. Which of the following variables is best classified as discrete?
A. Body temperature in degrees Celsius
B. Number of hospital admissions in a month
C. Serum creatinine concentration in mg/dL
D. Time to discharge in hours
Correct Answer: D
Rationale: The number of hospital admissions is a countable whole number and therefore discrete. Body
temperature, serum creatinine, and time are continuous variables that can take any value within a
range.
Question 6. A nurse manager calculates the interquartile range (IQR) for emergency
department wait times. The first quartile is 22 minutes and the third quartile is 58
minutes. What is the IQR?
A. 36 minutes
B. 40 minutes
C. 80 minutes
D. 22 minutes
Correct Answer: B
Rationale: The interquartile range equals Q3 minus Q1. Subtracting 22 from 58 yields 36 minutes. The
IQR measures the spread of the middle 50% of the data and is robust to outliers.
Question 7. In a frequency distribution of body mass index (BMI) categories, 35% of
patients fall into the obese category. If the total sample size is 200, how many patients are
classified as obese?
A. 35
B. 70
C. 65
D. 100
Correct Answer: A
Rationale: Thirty-five percent of 200 equals 0.35 × 200 = 70 patients. Relative frequency multiplied by
sample size yields the absolute frequency count.
Question 8. Which graphical display is most appropriate for visualizing the relationship
between two continuous variables such as age and systolic blood pressure?
A. Histogram
B. Bar chart
C. Scatterplot
D. Pie chart
Correct Answer: B
WGU C784 Applied Healthcare Statistics Objective Assessment Comprehensive Examination 2026/2027 | Verified Questions
WGU C784 Applied Healthcare Statistics
Objective Assessment Comprehensive
Examination 2026/2027 | Verified Questions
Western Governors University | C784 Applied Healthcare Statistics | University-Level Healthcare
Students
100 Verified Questions | 4 Core Domains | Academic Year 2026/2027
Prepared by
Western Governors University | C784 Applied Healthcare Statistics
Objective Assessment Comprehensive Examination Actual Exam | Academic Year
2026/2027
WGU C784 Applied Healthcare Statistics Objective Assessment Comprehensive Examination 2026/2027 | Verified Questions
,INTRODUCTION
This Objective Assessment Comprehensive Examination contains exactly 100 original verified questions
designed to reinforce the official Western Governors University C784 Applied Healthcare Statistics course
objectives for actual exam readiness and analytical proficiency, aligned to the 2026/2027 academic year.
The questions are organized across four core domains: Domain 1 – Descriptive Statistics and Data Types
(25 questions); Domain 2 – Probability and Distributions (25 questions); Domain 3 – Inferential
Statistics and Hypothesis Testing (25 questions); and Domain 4 – Healthcare Applications and Research
Interpretation (25 questions). Each question is accompanied by the correct answer and a detailed
rationale grounded in foundational healthcare statistics methodology, including principles drawn from
university-level biostatistics curricula and established textbooks such as Rosner’s Fundamentals of
Biostatistics and Sullivan’s Essentials of Biostatistics in Public Health. The content emphasizes conceptual
understanding, correct application of statistical procedures, and accurate interpretation of results in
clinical and public-health contexts.
ACTUAL QUESTIONS
Domain 1: Descriptive Statistics and Data Types
Question 1. A researcher records the blood pressure readings of 50 patients as continuous
values in mmHg. Which level of measurement best describes these data?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Correct Answer: D
Rationale: Blood pressure measured in mmHg has a true zero point (absence of pressure) and equal
intervals between values, making it a ratio-level measurement. Interval scales lack a true zero, while
nominal and ordinal scales are categorical or ranked without equal intervals.
Question 2. In a study of hospital length of stay, the mean is 5.2 days and the median is 4.0
days. What does this relationship suggest about the distribution of length of stay?
A. The distribution is approximately symmetric
B. The distribution is left-skewed
C. The distribution is right-skewed
D. The distribution is bimodal
Correct Answer: C
Rationale: When the mean exceeds the median, the distribution is typically right-skewed (positively
skewed) because extreme high values pull the mean upward. Length of stay data commonly exhibit right
skew due to a minority of patients with prolonged hospitalizations.
Question 3. Which measure of central tendency is most appropriate for summarizing a set
of ordinal pain scores ranging from 1 (no pain) to 10 (worst pain)?
A. Mean
B. Mode
C. Median
D. Geometric mean
Correct Answer: B
Rationale: Ordinal data have ranked categories without equal intervals, so the median is the preferred
measure of central tendency. The mean assumes interval or ratio properties and can be misleading with
ordinal scales; the mode may not capture the central location effectively.
WGU C784 Applied Healthcare Statistics Objective Assessment Comprehensive Examination 2026/2027 | Verified Questions
, Question 4. A dataset of patient ages has a variance of 64 years squared. What is the
standard deviation?
A. 4 years
B. 8 years
C. 16 years
D. 32 years
Correct Answer: C
Rationale: The standard deviation is the square root of the variance. The square root of 64 is 8, so the
standard deviation is 8 years. Variance is expressed in squared units while standard deviation returns
to the original units of measurement.
Question 5. Which of the following variables is best classified as discrete?
A. Body temperature in degrees Celsius
B. Number of hospital admissions in a month
C. Serum creatinine concentration in mg/dL
D. Time to discharge in hours
Correct Answer: D
Rationale: The number of hospital admissions is a countable whole number and therefore discrete. Body
temperature, serum creatinine, and time are continuous variables that can take any value within a
range.
Question 6. A nurse manager calculates the interquartile range (IQR) for emergency
department wait times. The first quartile is 22 minutes and the third quartile is 58
minutes. What is the IQR?
A. 36 minutes
B. 40 minutes
C. 80 minutes
D. 22 minutes
Correct Answer: B
Rationale: The interquartile range equals Q3 minus Q1. Subtracting 22 from 58 yields 36 minutes. The
IQR measures the spread of the middle 50% of the data and is robust to outliers.
Question 7. In a frequency distribution of body mass index (BMI) categories, 35% of
patients fall into the obese category. If the total sample size is 200, how many patients are
classified as obese?
A. 35
B. 70
C. 65
D. 100
Correct Answer: A
Rationale: Thirty-five percent of 200 equals 0.35 × 200 = 70 patients. Relative frequency multiplied by
sample size yields the absolute frequency count.
Question 8. Which graphical display is most appropriate for visualizing the relationship
between two continuous variables such as age and systolic blood pressure?
A. Histogram
B. Bar chart
C. Scatterplot
D. Pie chart
Correct Answer: B
WGU C784 Applied Healthcare Statistics Objective Assessment Comprehensive Examination 2026/2027 | Verified Questions
