WGU C784 OBJECTIVE ASSESSMENT 2 NEWEST 2026
ACTUAL EXAM| C784 APPLIED HEALTHCARE
STATISTICS OA EXAM WITH COMPLETE 200 REAL
EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (MOST RECENT!!)
A healthcare analyst reviews a dataset of patient weights. Most patients
weigh between 60–90 kg, but a few patients weigh over 200 kg due to
data entry errors. Which statistical measure would be most affected by
these extreme values?
A. Median
B. Mode
C. Mean
D. Range - Correct Answer - C. Mean
Extreme values (outliers) strongly influence the mean because it uses
every value in the calculation.
A nurse researcher finds that patients who exercise more frequently tend
to have lower blood pressure readings. The researcher describes the
relationship between exercise and blood pressure. What type of
correlation is demonstrated?
A. Positive correlation
B. Negative correlation
C. No correlation
D. Random correlation - Correct Answer - B. Negative correlation
When one variable increases while another decreases, the relationship is
negative correlation.
pg. 1
,A hospital tracks patient falls by unit. The data show:
Medical Unit: 12 falls
ICU: 3 falls
Surgical Unit: 8 falls
Which type of variable is the hospital unit?
A. Continuous variable
B. Quantitative variable
C. Categorical variable
D. Ratio variable - Correct Answer - C. Categorical variable
A researcher flips a coin to determine whether a patient receives a new
educational intervention. The researcher states that the probability of
getting heads is 50%. Which probability concept is being used?
A. Experimental probability
B. Theoretical probability
C. Regression analysis
D. Standard deviation - Correct Answer - B. Theoretical probability
Theoretical probability is based on expected outcomes rather than
collected observations.
A healthcare researcher wants to display the percentage of patients who
prefer different types of diets: vegetarian, low-carb, Mediterranean, and
standard diet. Which graph is most appropriate?
A. Scatterplot
B. Histogram
pg. 2
,C. Pie chart
D. Line graph - Correct Answer - C. Pie chart
Pie charts are useful for displaying proportions or percentages of
categories.
A study was conducted on the possible relationship between a
categorical variable and a quantitative variable. Which type of graphical
display is appropriate for displaying this relationship?
A. Scatterplot
B. Two-way table
C. Decision table
D. Side-by-side box plot - Correct Answer - D. Side-by-side box plot
A study is conducted on the possible relationship between gender and
patients with or without hypertension. Which numerical measure is
appropriate?
A. Regression analysis
B. Five-number summary
C. Correlation coefficient
D. Conditional percentages - Correct Answer - D. Conditional
percentages
A hospital administrator reviews a graph showing monthly infection
rates over five years. The graph shows a steady decrease in infections
after a new cleaning protocol was introduced. Which type of graph is
most appropriate for displaying this trend?
A. Line graph
pg. 3
, B. Pie chart
C. Bar graph
D. Histogram - Correct Answer - A. Line graph
Line graphs are used to show changes and trends over time.
A public health researcher wants to study the average recovery time after
knee surgery. The researcher randomly selects 150 patients from several
hospitals and records their recovery days. Which sampling method is
being used?
A. Convenience sampling
B. Random sampling
C. Stratified sampling
D. Systematic error sampling - Correct Answer - B. Random sampling
Random sampling gives each member of the population an equal chance
of being selected, reducing selection bias.
A hospital quality team reviews the number of patients discharged each
day for one week:
18, 22, 25, 20, 30, 28, 27
The team wants to identify the most frequently occurring value.
Which measure should be used?
A. Mean
B. Median
C. Mode
D. Standard deviation - Correct Answer - C. Mode
pg. 4
ACTUAL EXAM| C784 APPLIED HEALTHCARE
STATISTICS OA EXAM WITH COMPLETE 200 REAL
EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (MOST RECENT!!)
A healthcare analyst reviews a dataset of patient weights. Most patients
weigh between 60–90 kg, but a few patients weigh over 200 kg due to
data entry errors. Which statistical measure would be most affected by
these extreme values?
A. Median
B. Mode
C. Mean
D. Range - Correct Answer - C. Mean
Extreme values (outliers) strongly influence the mean because it uses
every value in the calculation.
A nurse researcher finds that patients who exercise more frequently tend
to have lower blood pressure readings. The researcher describes the
relationship between exercise and blood pressure. What type of
correlation is demonstrated?
A. Positive correlation
B. Negative correlation
C. No correlation
D. Random correlation - Correct Answer - B. Negative correlation
When one variable increases while another decreases, the relationship is
negative correlation.
pg. 1
,A hospital tracks patient falls by unit. The data show:
Medical Unit: 12 falls
ICU: 3 falls
Surgical Unit: 8 falls
Which type of variable is the hospital unit?
A. Continuous variable
B. Quantitative variable
C. Categorical variable
D. Ratio variable - Correct Answer - C. Categorical variable
A researcher flips a coin to determine whether a patient receives a new
educational intervention. The researcher states that the probability of
getting heads is 50%. Which probability concept is being used?
A. Experimental probability
B. Theoretical probability
C. Regression analysis
D. Standard deviation - Correct Answer - B. Theoretical probability
Theoretical probability is based on expected outcomes rather than
collected observations.
A healthcare researcher wants to display the percentage of patients who
prefer different types of diets: vegetarian, low-carb, Mediterranean, and
standard diet. Which graph is most appropriate?
A. Scatterplot
B. Histogram
pg. 2
,C. Pie chart
D. Line graph - Correct Answer - C. Pie chart
Pie charts are useful for displaying proportions or percentages of
categories.
A study was conducted on the possible relationship between a
categorical variable and a quantitative variable. Which type of graphical
display is appropriate for displaying this relationship?
A. Scatterplot
B. Two-way table
C. Decision table
D. Side-by-side box plot - Correct Answer - D. Side-by-side box plot
A study is conducted on the possible relationship between gender and
patients with or without hypertension. Which numerical measure is
appropriate?
A. Regression analysis
B. Five-number summary
C. Correlation coefficient
D. Conditional percentages - Correct Answer - D. Conditional
percentages
A hospital administrator reviews a graph showing monthly infection
rates over five years. The graph shows a steady decrease in infections
after a new cleaning protocol was introduced. Which type of graph is
most appropriate for displaying this trend?
A. Line graph
pg. 3
, B. Pie chart
C. Bar graph
D. Histogram - Correct Answer - A. Line graph
Line graphs are used to show changes and trends over time.
A public health researcher wants to study the average recovery time after
knee surgery. The researcher randomly selects 150 patients from several
hospitals and records their recovery days. Which sampling method is
being used?
A. Convenience sampling
B. Random sampling
C. Stratified sampling
D. Systematic error sampling - Correct Answer - B. Random sampling
Random sampling gives each member of the population an equal chance
of being selected, reducing selection bias.
A hospital quality team reviews the number of patients discharged each
day for one week:
18, 22, 25, 20, 30, 28, 27
The team wants to identify the most frequently occurring value.
Which measure should be used?
A. Mean
B. Median
C. Mode
D. Standard deviation - Correct Answer - C. Mode
pg. 4
