WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
WGU C784 — Applied Healthcare Statistics
Complete Exam Question Bank with Verified Solutions | OA & Final Test Preparation
Western Governors University | College of Health Professions | 2026/2027 Course Competencies
Total Questions
Sections Cognitive Mix Format
200 12 30% Recall · 50% Application · 20% Analysis MCQ (A–D, single correct)
Instructions: Select the single best response for each question. Verified answers appear in green with a [CORRECT] marker; the
rationale beneath each item explains why the correct option is right and why the distractors are wrong, with step-by-step
statistical calculations, formula application, interpretation principles, healthcare context, and OA readiness coaching notes.
Section 1: Introduction to Statistics, Data Types, and Levels of Measurement
Q1: Which branch of statistics involves using sample data to draw conclusions about a population?
A. Descriptive statistics
B. Inferential statistics [CORRECT]
C. Exploratory statistics
D. Biostatistics
Correct Answer: B
Rationale:
Inferential statistics uses sample data (e.g., a sample mean) to make probability-based conclusions about the unknown
population parameter. Descriptive statistics (A) only summarizes observed data, and (C) and (D) describe adjacent but
non-equivalent terms.
Q2: A researcher reports that the average systolic BP of 200 patients is 124 mmHg and concludes the
population mean is between 120 and 128. This is an example of:
A. Descriptive statistics only
B. Inferential statistics [CORRECT]
C. Probability calculation
D. Data visualization
Correct Answer: B
Rationale:
Generalizing from a sample (124 mmHg) to a population interval (120–128) is inferential — specifically a confidence
interval. The 124 mmHg average alone would be descriptive, but the inference step makes this inferential.
Q3: Which variable is QUALITATIVE (categorical)?
A. Blood pressure (mmHg)
B. Heart rate (bpm)
C. Blood type (A, B, AB, O) [CORRECT]
D. Weight (kg)
Correct Answer: C
Rationale:
Blood type places individuals into non-numeric categories (A/B/AB/O) — it is qualitative/nominal. Blood pressure (A),
heart rate (B), and weight (D) are measured numerically and are quantitative.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 1
,WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
Q4: Which variable is DISCRETE?
A. Body temperature
B. Height in cm
C. Number of admissions per day [CORRECT]
D. Weight in kg
Correct Answer: C
Rationale:
Number of admissions is a count (whole numbers only) — discrete. Temperature (A), height (B), and weight (D) are
continuous because they can take any value within an interval.
Q5: Which is an example of NOMINAL-level data?
A. Pain score 1-10
B. Eye color (blue, brown, green) [CORRECT]
C. Temperature in °C
D. Heart rate bpm
Correct Answer: B
Rationale:
Eye color categories have no inherent order — nominal. Pain score (A) is ordered (ordinal), temperature in °C (C) is
interval (no true zero), and heart rate (D) is ratio (true zero exists).
Q6: A pain scale labeled 0 (no pain), 1 (mild), 2 (moderate), 3 (severe) represents which level of measurement?
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale:
Pain scale values are ordered (mild < moderate < severe), but differences between levels are not necessarily equal —
ordinal. Nominal (A) lacks order; interval (C) requires equal spacing; ratio (D) requires a true zero.
Q7: Temperature in degrees Celsius is an example of which level of measurement?
A. Nominal
B. Ordinal
C. Interval [CORRECT]
D. Ratio
Correct Answer: C
Rationale:
Celsius has equal intervals but no true zero (0°C is not 'no heat'), making it interval. Nominal/Ordinal (A, B) lack numeric
scaling; ratio (D) requires a meaningful zero, which temperature in °C lacks.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 2
,WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
Q8: Heart rate in beats per minute is an example of which level of measurement?
A. Nominal
B. Ordinal
C. Interval
D. Ratio [CORRECT]
Correct Answer: D
Rationale:
Heart rate has equal intervals AND a true zero (0 bpm = no heart rate), making it ratio. Nominal (A) and ordinal (B) lack
numeric scaling, and interval (C) lacks a true zero.
Q9: A researcher classifies patients by blood type: A, B, AB, O. What level of measurement is this?
A. Nominal [CORRECT]
B. Ordinal
C. Interval
D. Ratio
Correct Answer: A
Rationale:
Blood type categories are mutually exclusive with no inherent ordering — nominal. Ordinal (B) requires rank; interval (C)
requires equal spacing; ratio (D) requires a true zero.
Q10: A survey asks patients to rate satisfaction as: Very Dissatisfied, Dissatisfied, Neutral, Satisfied, Very
Satisfied. This is:
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale:
Satisfaction categories are ordered but the 'distance' between them is not numerically equal — ordinal. Nominal (A) lacks
order; interval (C) requires equal intervals; ratio (D) requires a true zero.
Q11: Patient temperature measured in Fahrenheit represents which level of measurement?
A. Nominal
B. Ordinal
C. Interval [CORRECT]
D. Ratio
Correct Answer: C
Rationale:
Fahrenheit has equal intervals but no true zero (0°F is not 'no temperature') — interval. Nominal (A) and ordinal (B) lack
numeric scaling; ratio (D) requires a true zero, which Fahrenheit lacks.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 3
, WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
Q12: Number of hospital admissions per patient in a year represents which level of measurement?
A. Nominal
B. Ordinal
C. Interval
D. Ratio [CORRECT]
Correct Answer: D
Rationale:
Admission counts have equal intervals AND a true zero (0 admissions = none) — ratio. Nominal (A) and ordinal (B) lack
numeric scaling; interval (C) lacks a true zero.
Q13: BMI categories (Underweight <18.5, Normal 18.5-24.9, Overweight 25-29.9, Obese ≥30) form which level
of measurement?
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale:
BMI categories are ordered (Underweight → Obese) but the underlying interval widths differ and the categories are not
equally spaced — ordinal. The raw BMI value would be ratio, but the categories are ordinal.
Q14: Which term describes the ENTIRE group of individuals a researcher wants to study?
A. Sample
B. Population [CORRECT]
C. Cohort
D. Stratum
Correct Answer: B
Rationale:
Population = the entire group of interest. A sample (A) is a subset studied; cohort (C) is a specific study design; stratum (D)
is a subgroup in stratified sampling.
Q15: A numerical summary describing a SAMPLE is called a:
A. Parameter
B. Statistic [CORRECT]
C. Variable
D. Constant
Correct Answer: B
Rationale:
A statistic summarizes a sample; a parameter (A) summarizes a population. Variables (C) vary by individual; constants (D)
are fixed values.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 4
Verified Solutions
Bank | OA & Final Prep | 2026/2027
WGU C784 — Applied Healthcare Statistics
Complete Exam Question Bank with Verified Solutions | OA & Final Test Preparation
Western Governors University | College of Health Professions | 2026/2027 Course Competencies
Total Questions
Sections Cognitive Mix Format
200 12 30% Recall · 50% Application · 20% Analysis MCQ (A–D, single correct)
Instructions: Select the single best response for each question. Verified answers appear in green with a [CORRECT] marker; the
rationale beneath each item explains why the correct option is right and why the distractors are wrong, with step-by-step
statistical calculations, formula application, interpretation principles, healthcare context, and OA readiness coaching notes.
Section 1: Introduction to Statistics, Data Types, and Levels of Measurement
Q1: Which branch of statistics involves using sample data to draw conclusions about a population?
A. Descriptive statistics
B. Inferential statistics [CORRECT]
C. Exploratory statistics
D. Biostatistics
Correct Answer: B
Rationale:
Inferential statistics uses sample data (e.g., a sample mean) to make probability-based conclusions about the unknown
population parameter. Descriptive statistics (A) only summarizes observed data, and (C) and (D) describe adjacent but
non-equivalent terms.
Q2: A researcher reports that the average systolic BP of 200 patients is 124 mmHg and concludes the
population mean is between 120 and 128. This is an example of:
A. Descriptive statistics only
B. Inferential statistics [CORRECT]
C. Probability calculation
D. Data visualization
Correct Answer: B
Rationale:
Generalizing from a sample (124 mmHg) to a population interval (120–128) is inferential — specifically a confidence
interval. The 124 mmHg average alone would be descriptive, but the inference step makes this inferential.
Q3: Which variable is QUALITATIVE (categorical)?
A. Blood pressure (mmHg)
B. Heart rate (bpm)
C. Blood type (A, B, AB, O) [CORRECT]
D. Weight (kg)
Correct Answer: C
Rationale:
Blood type places individuals into non-numeric categories (A/B/AB/O) — it is qualitative/nominal. Blood pressure (A),
heart rate (B), and weight (D) are measured numerically and are quantitative.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 1
,WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
Q4: Which variable is DISCRETE?
A. Body temperature
B. Height in cm
C. Number of admissions per day [CORRECT]
D. Weight in kg
Correct Answer: C
Rationale:
Number of admissions is a count (whole numbers only) — discrete. Temperature (A), height (B), and weight (D) are
continuous because they can take any value within an interval.
Q5: Which is an example of NOMINAL-level data?
A. Pain score 1-10
B. Eye color (blue, brown, green) [CORRECT]
C. Temperature in °C
D. Heart rate bpm
Correct Answer: B
Rationale:
Eye color categories have no inherent order — nominal. Pain score (A) is ordered (ordinal), temperature in °C (C) is
interval (no true zero), and heart rate (D) is ratio (true zero exists).
Q6: A pain scale labeled 0 (no pain), 1 (mild), 2 (moderate), 3 (severe) represents which level of measurement?
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale:
Pain scale values are ordered (mild < moderate < severe), but differences between levels are not necessarily equal —
ordinal. Nominal (A) lacks order; interval (C) requires equal spacing; ratio (D) requires a true zero.
Q7: Temperature in degrees Celsius is an example of which level of measurement?
A. Nominal
B. Ordinal
C. Interval [CORRECT]
D. Ratio
Correct Answer: C
Rationale:
Celsius has equal intervals but no true zero (0°C is not 'no heat'), making it interval. Nominal/Ordinal (A, B) lack numeric
scaling; ratio (D) requires a meaningful zero, which temperature in °C lacks.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 2
,WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
Q8: Heart rate in beats per minute is an example of which level of measurement?
A. Nominal
B. Ordinal
C. Interval
D. Ratio [CORRECT]
Correct Answer: D
Rationale:
Heart rate has equal intervals AND a true zero (0 bpm = no heart rate), making it ratio. Nominal (A) and ordinal (B) lack
numeric scaling, and interval (C) lacks a true zero.
Q9: A researcher classifies patients by blood type: A, B, AB, O. What level of measurement is this?
A. Nominal [CORRECT]
B. Ordinal
C. Interval
D. Ratio
Correct Answer: A
Rationale:
Blood type categories are mutually exclusive with no inherent ordering — nominal. Ordinal (B) requires rank; interval (C)
requires equal spacing; ratio (D) requires a true zero.
Q10: A survey asks patients to rate satisfaction as: Very Dissatisfied, Dissatisfied, Neutral, Satisfied, Very
Satisfied. This is:
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale:
Satisfaction categories are ordered but the 'distance' between them is not numerically equal — ordinal. Nominal (A) lacks
order; interval (C) requires equal intervals; ratio (D) requires a true zero.
Q11: Patient temperature measured in Fahrenheit represents which level of measurement?
A. Nominal
B. Ordinal
C. Interval [CORRECT]
D. Ratio
Correct Answer: C
Rationale:
Fahrenheit has equal intervals but no true zero (0°F is not 'no temperature') — interval. Nominal (A) and ordinal (B) lack
numeric scaling; ratio (D) requires a true zero, which Fahrenheit lacks.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 3
, WGU C784 — APPLIED HEALTHCARE STATISTICS | Complete Exam Question
Verified Solutions
Bank | OA & Final Prep | 2026/2027
Q12: Number of hospital admissions per patient in a year represents which level of measurement?
A. Nominal
B. Ordinal
C. Interval
D. Ratio [CORRECT]
Correct Answer: D
Rationale:
Admission counts have equal intervals AND a true zero (0 admissions = none) — ratio. Nominal (A) and ordinal (B) lack
numeric scaling; interval (C) lacks a true zero.
Q13: BMI categories (Underweight <18.5, Normal 18.5-24.9, Overweight 25-29.9, Obese ≥30) form which level
of measurement?
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale:
BMI categories are ordered (Underweight → Obese) but the underlying interval widths differ and the categories are not
equally spaced — ordinal. The raw BMI value would be ratio, but the categories are ordinal.
Q14: Which term describes the ENTIRE group of individuals a researcher wants to study?
A. Sample
B. Population [CORRECT]
C. Cohort
D. Stratum
Correct Answer: B
Rationale:
Population = the entire group of interest. A sample (A) is a subset studied; cohort (C) is a specific study design; stratum (D)
is a subgroup in stratified sampling.
Q15: A numerical summary describing a SAMPLE is called a:
A. Parameter
B. Statistic [CORRECT]
C. Variable
D. Constant
Correct Answer: B
Rationale:
A statistic summarizes a sample; a parameter (A) summarizes a population. Variables (C) vary by individual; constants (D)
are fixed values.
Western Governors University • College of Health Professions • 2026/2027 Course Competencies Page 4
