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WGU C784 Applied Healthcare Statistics OA
Exam – Complete 400 Questions with
Verified Detailed Answers, Already Graded
A+
Official Exam Overview:
The WGU C784 OA evaluates learners’ ability to apply statistical and quantitative reasoning in
healthcare settings. The exam emphasizes correct use of arithmetic, descriptive statistics,
probability, inferential statistics, and data interpretation to support clinical and administrative
decisions.
Exam Coverage Areas:
• Descriptive statistics and numerical calculations
• Probability and distributions
• Order of operations and algebraic expressions
• Data analysis for healthcare outcomes
• Application of statistical reasoning in patient care and operations
QUESTION 1:
Given the expression: 4 + 7 × (6 − 3)², what is the correct answer using the proper order of
operations?
A) 25
B) 46
C) 67 ✅
D) 99
Rationale:
Step-by-step using PEMDAS/BODMAS:
1. Parentheses: (6 − 3) = 3
2. Exponent: 3² = 9
3. Multiplication: 7 × 9 = 63
4. Addition: 4 + 63 = 67
Correct answer = C. 67
QUESTION 2:
A dataset contains the following values: 12, 15, 18, 20, 25. What is the mean?
,A) 17.5
B) 18 ✅
C) 19
D) 20
Rationale:
• Sum of values: 12 + 15 + 18 + 20 + 25 = 90
• Divide by number of values: 90 ÷ 5 = 18
QUESTION 3:
Using the same dataset (12, 15, 18, 20, 25), what is the median?
A) 15
B) 18 ✅
C) 20
D) 19
Rationale:
• Order dataset ascending: 12, 15, 18, 20, 25
• Median = middle value = 18
QUESTION 4:
A hospital records patient visits over a week: 10, 12, 10, 14, 13, 10, 15. What is the mode?
A) 12
B) 10 ✅
C) 13
D) 14
Rationale:
• Mode = value appearing most frequently
• 10 appears 3 times, others appear less → Mode = 10
QUESTION 5:
A nurse measures blood glucose levels: 90, 95, 100, 105, 110. What is the range?
A) 15
B) 20 ✅
C) 10
D) 25
Rationale:
• Range = Maximum – Minimum = 110 − 90 = 20
,Given the following expression: 4 + 7 × (6 - 3)2. What is the answer using proper order of
operations?
A. 25
B. 46
C. 67
D. 99 - ANSWER-C. 67
Given the following expression: 5 x (30 - 27)2 + 4. What is the correct answer using the proper
order of operations?
A. 34
B. 49
C. 65
D. 81 - ANSWER-B. 49
What is 3/14 - 1/7?
A. 1/14
1
, Page 2 of 100
B. 2/7
C. 5/14
D. 3/2 - ANSWER-A. 1/14
What is the greatest common factor of 132 and the square root of 121 using prime
factorization?
A. 1
B. 2
C. 10
D. 11 - ANSWER-D. 11
What is the greatest common factor of 24 and 84 using prime factorization?
A. 2
B. 4
C. 8
D. 12 - ANSWER-D. 12
Exponents - ANSWER-Sometimes called a power, it is a quantity that represents repeated
multiplication.
2
WGU C784 Applied Healthcare Statistics OA
Exam – Complete 400 Questions with
Verified Detailed Answers, Already Graded
A+
Official Exam Overview:
The WGU C784 OA evaluates learners’ ability to apply statistical and quantitative reasoning in
healthcare settings. The exam emphasizes correct use of arithmetic, descriptive statistics,
probability, inferential statistics, and data interpretation to support clinical and administrative
decisions.
Exam Coverage Areas:
• Descriptive statistics and numerical calculations
• Probability and distributions
• Order of operations and algebraic expressions
• Data analysis for healthcare outcomes
• Application of statistical reasoning in patient care and operations
QUESTION 1:
Given the expression: 4 + 7 × (6 − 3)², what is the correct answer using the proper order of
operations?
A) 25
B) 46
C) 67 ✅
D) 99
Rationale:
Step-by-step using PEMDAS/BODMAS:
1. Parentheses: (6 − 3) = 3
2. Exponent: 3² = 9
3. Multiplication: 7 × 9 = 63
4. Addition: 4 + 63 = 67
Correct answer = C. 67
QUESTION 2:
A dataset contains the following values: 12, 15, 18, 20, 25. What is the mean?
,A) 17.5
B) 18 ✅
C) 19
D) 20
Rationale:
• Sum of values: 12 + 15 + 18 + 20 + 25 = 90
• Divide by number of values: 90 ÷ 5 = 18
QUESTION 3:
Using the same dataset (12, 15, 18, 20, 25), what is the median?
A) 15
B) 18 ✅
C) 20
D) 19
Rationale:
• Order dataset ascending: 12, 15, 18, 20, 25
• Median = middle value = 18
QUESTION 4:
A hospital records patient visits over a week: 10, 12, 10, 14, 13, 10, 15. What is the mode?
A) 12
B) 10 ✅
C) 13
D) 14
Rationale:
• Mode = value appearing most frequently
• 10 appears 3 times, others appear less → Mode = 10
QUESTION 5:
A nurse measures blood glucose levels: 90, 95, 100, 105, 110. What is the range?
A) 15
B) 20 ✅
C) 10
D) 25
Rationale:
• Range = Maximum – Minimum = 110 − 90 = 20
,Given the following expression: 4 + 7 × (6 - 3)2. What is the answer using proper order of
operations?
A. 25
B. 46
C. 67
D. 99 - ANSWER-C. 67
Given the following expression: 5 x (30 - 27)2 + 4. What is the correct answer using the proper
order of operations?
A. 34
B. 49
C. 65
D. 81 - ANSWER-B. 49
What is 3/14 - 1/7?
A. 1/14
1
, Page 2 of 100
B. 2/7
C. 5/14
D. 3/2 - ANSWER-A. 1/14
What is the greatest common factor of 132 and the square root of 121 using prime
factorization?
A. 1
B. 2
C. 10
D. 11 - ANSWER-D. 11
What is the greatest common factor of 24 and 84 using prime factorization?
A. 2
B. 4
C. 8
D. 12 - ANSWER-D. 12
Exponents - ANSWER-Sometimes called a power, it is a quantity that represents repeated
multiplication.
2
