WGU C784 Applied Healthcare Statistics Mock Final Exam verified with correct
answers 2026/2027 version/instant pdf
1. Which measure of center is most affected by extreme values (outliers)?
• A. Median
• B. Mode
• C. Mean
• D. Range
Answer: C
Rationale: The mean uses every value and is sensitive to outliers.
2. Which graph is best for displaying the distribution of continuous data?
• A. Pie chart
• B. Histogram
• C. Bar chart
• D. Line graph
Answer: B
Rationale: Histograms display the distribution of continuous numerical data.
3. Which variable is qualitative?
• A. Weight
• B. Blood pressure
• C. Blood type
• D. Height
Answer: C
Rationale: Blood type is categorical (qualitative).
4. The probability of an impossible event is:
• A. 1
• B. 0
, • C. 0.5
• D. −1
Answer: B
Rationale: Impossible events have probability 0.
5. If 20 of 100 patients have hypertension, what is the probability that a randomly selected
patient has hypertension?
• A. 0.02
• B. 0.20
• C. 2.00
• D. 20
Answer: B
Rationale: Probability = 20 ÷ 100 = 0.20.
6. Which measure represents the middle value in an ordered dataset?
• A. Mean
• B. Median
• C. Mode
• D. Range
Answer: B
Rationale: The median is the middle observation.
7. Which measure describes the spread of data?
• A. Mean
• B. Median
• C. Standard deviation
• D. Mode
Answer: C
Rationale: Standard deviation measures variability.
, 8. A positive correlation means:
• A. One variable increases while the other decreases.
• B. Both variables increase together.
• C. There is no relationship.
• D. The variables are identical.
Answer: B
Rationale: Positive correlation means the variables move in the same direction.
9. Which value indicates the strongest positive correlation?
• A. –0.90
• B. 0.10
• C. 0.95
• D. 0
Answer: C
Rationale: Correlation coefficients closer to +1 indicate a stronger positive relationship.
10. Which graph is best for showing the relationship between two numerical variables?
• A. Pie chart
• B. Scatterplot
• C. Histogram
• D. Bar chart
Answer: B
Rationale: Scatterplots display relationships between two quantitative variables.
11. Which is an example of a discrete variable?
• A. Height
• B. Weight
• C. Number of hospital admissions
answers 2026/2027 version/instant pdf
1. Which measure of center is most affected by extreme values (outliers)?
• A. Median
• B. Mode
• C. Mean
• D. Range
Answer: C
Rationale: The mean uses every value and is sensitive to outliers.
2. Which graph is best for displaying the distribution of continuous data?
• A. Pie chart
• B. Histogram
• C. Bar chart
• D. Line graph
Answer: B
Rationale: Histograms display the distribution of continuous numerical data.
3. Which variable is qualitative?
• A. Weight
• B. Blood pressure
• C. Blood type
• D. Height
Answer: C
Rationale: Blood type is categorical (qualitative).
4. The probability of an impossible event is:
• A. 1
• B. 0
, • C. 0.5
• D. −1
Answer: B
Rationale: Impossible events have probability 0.
5. If 20 of 100 patients have hypertension, what is the probability that a randomly selected
patient has hypertension?
• A. 0.02
• B. 0.20
• C. 2.00
• D. 20
Answer: B
Rationale: Probability = 20 ÷ 100 = 0.20.
6. Which measure represents the middle value in an ordered dataset?
• A. Mean
• B. Median
• C. Mode
• D. Range
Answer: B
Rationale: The median is the middle observation.
7. Which measure describes the spread of data?
• A. Mean
• B. Median
• C. Standard deviation
• D. Mode
Answer: C
Rationale: Standard deviation measures variability.
, 8. A positive correlation means:
• A. One variable increases while the other decreases.
• B. Both variables increase together.
• C. There is no relationship.
• D. The variables are identical.
Answer: B
Rationale: Positive correlation means the variables move in the same direction.
9. Which value indicates the strongest positive correlation?
• A. –0.90
• B. 0.10
• C. 0.95
• D. 0
Answer: C
Rationale: Correlation coefficients closer to +1 indicate a stronger positive relationship.
10. Which graph is best for showing the relationship between two numerical variables?
• A. Pie chart
• B. Scatterplot
• C. Histogram
• D. Bar chart
Answer: B
Rationale: Scatterplots display relationships between two quantitative variables.
11. Which is an example of a discrete variable?
• A. Height
• B. Weight
• C. Number of hospital admissions
