WGU C784 Applied Healthcare
Statistics: verified 100 Practice
Questions with Answers plus Rationales
Covering All Four Core Domains (latest)
Question 1
Which of the following is the most appropriate measure of central tendency for a
dataset that is heavily skewed?
A. Mean
B. Median
C. Mode
D. Standard deviation
Answer: B. Median
Rationale: The median is not affected by extreme values (outliers), making it the best
measure of central tendency for skewed data.
Question 2
A medication order reads 125 mcg. Available tablets are labeled 0.25 mg. How many
tablets will the nurse administer?
A. 0.25
B. 0.5
C. 1
D. 2
Answer: B. 0.5
Rationale: Convert 125 mcg to mg: 125 mcg = 0.125 mg. Then, Desired dose / Have
= 0.125 mg / 0.25 mg = 0.5 tablet.
Question 3
A patient consumed 1/3 of a 240 mL juice can. How many milliliters remain?
A. 60 mL
B. 80 mL
C. 160 mL
D. 180 mL
,Answer: C. 160 mL
Rationale: The remaining fraction is 1 - 1/3 = 2/3. Then, (2/3) × 240 mL = 160 mL.
Question 4
A solution contains 50 mg of drug in 2 mL. How many mg are in 0.6 mL?
A. 10 mg
B. 12.5 mg
C. 15 mg
D. 20 mg
Answer: C. 15 mg
Rationale: The concentration is 50 mg / 2 mL = 25 mg/mL. Therefore, 25 mg/mL ×
0.6 mL = 15 mg.
Question 5
Express 0.45 as a fraction in lowest terms.
A. 45/100
B. 9/20
C. 4/5
D. 9/50
Answer: B. 9/20
Rationale: 0.45 = 45/100. Divide both numerator and denominator by 5 to simplify
to 9/20.
Question 6
Convert 3/8 to a decimal.
A. 0.325
B. 0.375
C. 0.425
D. 0.475
Answer: B. 0.375
Rationale: 3 ÷ 8 = 0.375.
Question 7
A patient weighs 154 lbs. How many kg? (1 kg = 2.2 lb)
A. 63 kg
B. 70 kg
C. 77 kg
D. 338.8 kg
Answer: B. 70 kg
Rationale: 154 lbs / 2.2 = 70 kg.
, Question 8
Given the following expression: 5 × (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
Rationale: Use PEMDAS (Parentheses, Exponents, Multiplication/Division,
Addition/Subtraction). First: (30-27)=3. Second: 3²=9. Third: 5×9=45. Fourth:
45+4=49.
Question 9
A dataset has a mean of 50 and a standard deviation of 10. Which of the following is
the z-score for a value of 60?
A. 0
B. 1
C. 2
D. 10
Answer: B. 1
Rationale: The z-score is calculated as (X - μ) / σ. In this case, (60 - 50) / 10 = 1.
Question 10
Given the following set of numbers: 3.3, -2.3, -16, 25. What are the square roots of
the whole number?
A. ±2.3
B. ±3.3
C. ±4
D. ±5
Answer: D. ±5
Rationale: The only whole number in the set is 25. The square roots of 25 are +5 and
-5.
Question 11
What is 3/5 as a percentage?
A. 30%
B. 35%
C. 60%
D. 75%
Statistics: verified 100 Practice
Questions with Answers plus Rationales
Covering All Four Core Domains (latest)
Question 1
Which of the following is the most appropriate measure of central tendency for a
dataset that is heavily skewed?
A. Mean
B. Median
C. Mode
D. Standard deviation
Answer: B. Median
Rationale: The median is not affected by extreme values (outliers), making it the best
measure of central tendency for skewed data.
Question 2
A medication order reads 125 mcg. Available tablets are labeled 0.25 mg. How many
tablets will the nurse administer?
A. 0.25
B. 0.5
C. 1
D. 2
Answer: B. 0.5
Rationale: Convert 125 mcg to mg: 125 mcg = 0.125 mg. Then, Desired dose / Have
= 0.125 mg / 0.25 mg = 0.5 tablet.
Question 3
A patient consumed 1/3 of a 240 mL juice can. How many milliliters remain?
A. 60 mL
B. 80 mL
C. 160 mL
D. 180 mL
,Answer: C. 160 mL
Rationale: The remaining fraction is 1 - 1/3 = 2/3. Then, (2/3) × 240 mL = 160 mL.
Question 4
A solution contains 50 mg of drug in 2 mL. How many mg are in 0.6 mL?
A. 10 mg
B. 12.5 mg
C. 15 mg
D. 20 mg
Answer: C. 15 mg
Rationale: The concentration is 50 mg / 2 mL = 25 mg/mL. Therefore, 25 mg/mL ×
0.6 mL = 15 mg.
Question 5
Express 0.45 as a fraction in lowest terms.
A. 45/100
B. 9/20
C. 4/5
D. 9/50
Answer: B. 9/20
Rationale: 0.45 = 45/100. Divide both numerator and denominator by 5 to simplify
to 9/20.
Question 6
Convert 3/8 to a decimal.
A. 0.325
B. 0.375
C. 0.425
D. 0.475
Answer: B. 0.375
Rationale: 3 ÷ 8 = 0.375.
Question 7
A patient weighs 154 lbs. How many kg? (1 kg = 2.2 lb)
A. 63 kg
B. 70 kg
C. 77 kg
D. 338.8 kg
Answer: B. 70 kg
Rationale: 154 lbs / 2.2 = 70 kg.
, Question 8
Given the following expression: 5 × (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
Rationale: Use PEMDAS (Parentheses, Exponents, Multiplication/Division,
Addition/Subtraction). First: (30-27)=3. Second: 3²=9. Third: 5×9=45. Fourth:
45+4=49.
Question 9
A dataset has a mean of 50 and a standard deviation of 10. Which of the following is
the z-score for a value of 60?
A. 0
B. 1
C. 2
D. 10
Answer: B. 1
Rationale: The z-score is calculated as (X - μ) / σ. In this case, (60 - 50) / 10 = 1.
Question 10
Given the following set of numbers: 3.3, -2.3, -16, 25. What are the square roots of
the whole number?
A. ±2.3
B. ±3.3
C. ±4
D. ±5
Answer: D. ±5
Rationale: The only whole number in the set is 25. The square roots of 25 are +5 and
-5.
Question 11
What is 3/5 as a percentage?
A. 30%
B. 35%
C. 60%
D. 75%
