WGU C784 APPLIED HEALTHCARE STATISTICS OBJECTIVE
ASSESSMENT (OA) ACTUAL EXAM 2026/2027 COMPLETE
ACCURATE TEST REAL QUESTIONS AND CORRECT DETAILED
ANSWERS (100% CORRECT VERIFIED SOLUTIONS) LATEST
UPDATED VERSION 2026 EDITION |GUARANTEED SUCCESS A+
|FULL REVISED WGU C784 EXAM
Time Limit: 2.5 hours
Number of Questions: 100
Passing Score: 75%
1. A dataset contains patient ages: 22, 34, 45, 45, 56, 67, 78. What is the
median age?
A) 45
B) 56
C) 67
D) 45.5
CORRECT ANSWER: A) 45
2. Which measure of central tendency is most affected by outliers in a
hospital length-of-stay dataset?
A) Median
B) Mode
C) Mean
D) Range
CORRECT ANSWER: C) Mean
,3. A nurse records heart rates: 72, 74, 76, 78, 80. What is the standard
deviation (population)?
A) 2
B) 2.83
C) 3.16
D) 4
CORRECT ANSWER: B) 2.83
4. The IQR for blood pressure readings is 30 mmHg. This represents the
range between which percentiles?
A) 10th and 90th
B) 25th and 75th
C) 5th and 95th
D) 1st and 99th
CORRECT ANSWER: B) 25th and 75th
5. A distribution of patient wait times is skewed right. The mean is 45
min, median is 30 min. The mode is most likely:
A) > 45 min
B) Between 30 and 45 min
C) < 30 min
D) 45 min
CORRECT ANSWER: C) < 30 min
6. Which graph is best for showing the relationship between two
continuous variables (e.g., age vs. cholesterol)?
A) Bar chart
B) Histogram
C) Scatterplot
D) Pie chart
CORRECT ANSWER: C) Scatterplot
, 7. The variance of a dataset is 36. What is the standard deviation?
A) 6
B) 18
C) 12
D) 9
CORRECT ANSWER: A) 6
8. In a boxplot, the “whiskers” typically extend to:
A) Min and max values
B) Q1 and Q3
C) Mean ± 1 SD
D) 1.5 × IQR from Q1 and Q3
CORRECT ANSWER: D) 1.5 × IQR from Q1 and Q3
9. A histogram of BMI values shows a bell-shaped curve. This indicates:
A) Skewed left distribution
B) Uniform distribution
C) Normal distribution
D) Bimodal distribution
CORRECT ANSWER: C) Normal distribution
10. Which measure is least affected by outliers in a clinical study?
A) Mean
B) Median
C) Range
D) Variance
CORRECT ANSWER: B) Median
11. The mean systolic BP is 120, standard deviation 10. What is the z-
score for a BP of 135?
A) 1.5
B) -1.5
ASSESSMENT (OA) ACTUAL EXAM 2026/2027 COMPLETE
ACCURATE TEST REAL QUESTIONS AND CORRECT DETAILED
ANSWERS (100% CORRECT VERIFIED SOLUTIONS) LATEST
UPDATED VERSION 2026 EDITION |GUARANTEED SUCCESS A+
|FULL REVISED WGU C784 EXAM
Time Limit: 2.5 hours
Number of Questions: 100
Passing Score: 75%
1. A dataset contains patient ages: 22, 34, 45, 45, 56, 67, 78. What is the
median age?
A) 45
B) 56
C) 67
D) 45.5
CORRECT ANSWER: A) 45
2. Which measure of central tendency is most affected by outliers in a
hospital length-of-stay dataset?
A) Median
B) Mode
C) Mean
D) Range
CORRECT ANSWER: C) Mean
,3. A nurse records heart rates: 72, 74, 76, 78, 80. What is the standard
deviation (population)?
A) 2
B) 2.83
C) 3.16
D) 4
CORRECT ANSWER: B) 2.83
4. The IQR for blood pressure readings is 30 mmHg. This represents the
range between which percentiles?
A) 10th and 90th
B) 25th and 75th
C) 5th and 95th
D) 1st and 99th
CORRECT ANSWER: B) 25th and 75th
5. A distribution of patient wait times is skewed right. The mean is 45
min, median is 30 min. The mode is most likely:
A) > 45 min
B) Between 30 and 45 min
C) < 30 min
D) 45 min
CORRECT ANSWER: C) < 30 min
6. Which graph is best for showing the relationship between two
continuous variables (e.g., age vs. cholesterol)?
A) Bar chart
B) Histogram
C) Scatterplot
D) Pie chart
CORRECT ANSWER: C) Scatterplot
, 7. The variance of a dataset is 36. What is the standard deviation?
A) 6
B) 18
C) 12
D) 9
CORRECT ANSWER: A) 6
8. In a boxplot, the “whiskers” typically extend to:
A) Min and max values
B) Q1 and Q3
C) Mean ± 1 SD
D) 1.5 × IQR from Q1 and Q3
CORRECT ANSWER: D) 1.5 × IQR from Q1 and Q3
9. A histogram of BMI values shows a bell-shaped curve. This indicates:
A) Skewed left distribution
B) Uniform distribution
C) Normal distribution
D) Bimodal distribution
CORRECT ANSWER: C) Normal distribution
10. Which measure is least affected by outliers in a clinical study?
A) Mean
B) Median
C) Range
D) Variance
CORRECT ANSWER: B) Median
11. The mean systolic BP is 120, standard deviation 10. What is the z-
score for a BP of 135?
A) 1.5
B) -1.5
