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WGU C784 Applied Healthcare Statistics OA
Exam – Complete 500 Questions with Verified
Detailed Answers, Recently Updated
Official Exam Overview:
The WGU C784 OA evaluates learners’ understanding of applied healthcare statistics, including
descriptive and inferential statistics, probability, data interpretation, and quantitative analysis for
healthcare decision-making. The exam emphasizes calculation, critical thinking, and application
of statistical methods in clinical and operational contexts.
Exam Coverage Areas:
• Descriptive statistics and data summaries
• Probability and distributions
• Inferential statistics and hypothesis testing
• Correlation, regression, and predictive modeling
• Data interpretation in healthcare outcomes
• Application of statistics in clinical and operational decision-making
QUESTION 1:
A patient’s protein intake for today is 15.76g, 8.49g, and 22.58g. What is the total protein intake
rounded to the nearest tenth of a gram?
A) 46.5 g
B) 46.8 g ✅
C) 46.9 g
D) 47 g
Rationale:
Step-by-step calculation:
1. Add the values: 15.76 + 8.49 = 24.25
2. Add 22.58: 24.25 + 22.58 = 46.83
3. Round 46.83 to the nearest tenth → 46.8 g
QUESTION 2:
A nurse records the following blood pressures (mmHg) for 5 patients: 120, 132, 128, 140, 136.
What is the mean blood pressure?
A) 130 mmHg
B) 131.2 mmHg ✅
,C) 134 mmHg
D) 135 mmHg
Rationale:
• Sum values: 120 + 132 + 128 + 140 + 136 = 656
• Divide by number of patients: 656 ÷ 5 = 131.2 mmHg
QUESTION 3:
A dataset of patient weights (kg) is: 60, 72, 68, 75, 65. What is the median weight?
A) 68 kg ✅
B) 65 kg
C) 70 kg
D) 72 kg
Rationale:
• Order ascending: 60, 65, 68, 72, 75
• Median = middle value → 68 kg
QUESTION 4:
A nurse measures heart rates for 6 patients: 78, 82, 80, 76, 84, 88. What is the range of the
dataset?
A) 12 ✅
B) 10
C) 8
D) 14
Rationale:
• Range = Maximum – Minimum = 88 – 76 = 12 bpm
QUESTION 5:
A hospital reports the following number of patients per day over a week: 12, 15, 11, 14, 13, 12,
16. What is the mode?
A) 12 ✅
B) 13
C) 14
D) 15
Rationale:
• Mode = value that appears most frequently
• 12 appears twice, all others appear once → Mode = 12
,A patient's protein intake for today has been 15.76g, 8.49g, and 22.58g. What is the total
protein intake rounded to the nearest tenth of a decimal?
A. 46.5g
B. 46.8g
C. 46.9g
D. 47g - ANSWER-B. 46.8g
Given the equation: (.5475 - .3025) x .15. What is the solution rounded to the nearest
thousandth?
A. .03675
B. .0368
C. .368
D. .037 - ANSWER-D. .037
An intravenous drip is infused at a rate of 4.5 milliliters per minute. How many milliliters are
infused per hour?
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A. .075mL
B. 2.7mL
C. 75mL
D. 270mL - ANSWER-D. 270mL
A patient's medication was increased by 40 milligrams. What is the percent increase in the
medication if the original medication was 180 milligrams?
A. 2.2%
B. 4.5%
C. 22.2%
D. 45% - ANSWER-C. 22.2%
What is the Fahrenheit equivalent for a patient's room that needs to be kept at 25 degrees
Celsius?
A. 70°
B. 75°
C. 77°
D. 80° - ANSWER-C. 77°
2
WGU C784 Applied Healthcare Statistics OA
Exam – Complete 500 Questions with Verified
Detailed Answers, Recently Updated
Official Exam Overview:
The WGU C784 OA evaluates learners’ understanding of applied healthcare statistics, including
descriptive and inferential statistics, probability, data interpretation, and quantitative analysis for
healthcare decision-making. The exam emphasizes calculation, critical thinking, and application
of statistical methods in clinical and operational contexts.
Exam Coverage Areas:
• Descriptive statistics and data summaries
• Probability and distributions
• Inferential statistics and hypothesis testing
• Correlation, regression, and predictive modeling
• Data interpretation in healthcare outcomes
• Application of statistics in clinical and operational decision-making
QUESTION 1:
A patient’s protein intake for today is 15.76g, 8.49g, and 22.58g. What is the total protein intake
rounded to the nearest tenth of a gram?
A) 46.5 g
B) 46.8 g ✅
C) 46.9 g
D) 47 g
Rationale:
Step-by-step calculation:
1. Add the values: 15.76 + 8.49 = 24.25
2. Add 22.58: 24.25 + 22.58 = 46.83
3. Round 46.83 to the nearest tenth → 46.8 g
QUESTION 2:
A nurse records the following blood pressures (mmHg) for 5 patients: 120, 132, 128, 140, 136.
What is the mean blood pressure?
A) 130 mmHg
B) 131.2 mmHg ✅
,C) 134 mmHg
D) 135 mmHg
Rationale:
• Sum values: 120 + 132 + 128 + 140 + 136 = 656
• Divide by number of patients: 656 ÷ 5 = 131.2 mmHg
QUESTION 3:
A dataset of patient weights (kg) is: 60, 72, 68, 75, 65. What is the median weight?
A) 68 kg ✅
B) 65 kg
C) 70 kg
D) 72 kg
Rationale:
• Order ascending: 60, 65, 68, 72, 75
• Median = middle value → 68 kg
QUESTION 4:
A nurse measures heart rates for 6 patients: 78, 82, 80, 76, 84, 88. What is the range of the
dataset?
A) 12 ✅
B) 10
C) 8
D) 14
Rationale:
• Range = Maximum – Minimum = 88 – 76 = 12 bpm
QUESTION 5:
A hospital reports the following number of patients per day over a week: 12, 15, 11, 14, 13, 12,
16. What is the mode?
A) 12 ✅
B) 13
C) 14
D) 15
Rationale:
• Mode = value that appears most frequently
• 12 appears twice, all others appear once → Mode = 12
,A patient's protein intake for today has been 15.76g, 8.49g, and 22.58g. What is the total
protein intake rounded to the nearest tenth of a decimal?
A. 46.5g
B. 46.8g
C. 46.9g
D. 47g - ANSWER-B. 46.8g
Given the equation: (.5475 - .3025) x .15. What is the solution rounded to the nearest
thousandth?
A. .03675
B. .0368
C. .368
D. .037 - ANSWER-D. .037
An intravenous drip is infused at a rate of 4.5 milliliters per minute. How many milliliters are
infused per hour?
1
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A. .075mL
B. 2.7mL
C. 75mL
D. 270mL - ANSWER-D. 270mL
A patient's medication was increased by 40 milligrams. What is the percent increase in the
medication if the original medication was 180 milligrams?
A. 2.2%
B. 4.5%
C. 22.2%
D. 45% - ANSWER-C. 22.2%
What is the Fahrenheit equivalent for a patient's room that needs to be kept at 25 degrees
Celsius?
A. 70°
B. 75°
C. 77°
D. 80° - ANSWER-C. 77°
2
