WGU C784 – APPLIED HEALTHCARE STATISTICS
OBJECTIVE ASSESSMENT EXAM
ACTUAL EXAM QUESTIONS AND 100% VERIFIED
ANSWERS WITH RATIONALES GRADED A+
LATEST
Question 1
A nurse researcher summarizes systolic blood pressure values from a clinic
population. The distribution is heavily right-skewed due to several extremely high
readings. Which measure of central tendency best represents the “typical” blood
pressure?
A. Mean
B. Median
C. Mode
D. Range
Correct Answer: B. Median
Rationale:
In skewed distributions, the median is resistant to extreme values and best
represents the typical observation. The mean would be pulled upward by outliers.
,Question 2
Which Excel function would a healthcare analyst use to calculate the standard
deviation of a sample of patient cholesterol values?
A. =VAR.P()
B. =STDEV.S()
C. =AVERAGE()
D. =MEDIAN()
Correct Answer: B. =STDEV.S()
Rationale:
=STDEV.S() calculates the sample standard deviation, which is appropriate when
data represent a sample rather than an entire population.
_____________________________________________________
Question 3
A dataset shows the following values:
120, 122, 125, 130, 250
Which statement is most accurate?
,A. The mean equals the median
B. The range is small
C. There is a likely outlier
D. The distribution is symmetric
Correct Answer: C. There is a likely outlier
Rationale:
The value 250 is substantially higher than the rest, suggesting an outlier that can
distort the mean and spread.
Question 4
Which statistic best measures variability in patient length-of-stay data?
A. Mean
B. Median
C. Standard deviation
D. Mode
Correct Answer: C. Standard deviation
, Rationale:
Standard deviation quantifies how much individual values vary from the mean,
making it ideal for understanding variability.
Question 5
A boxplot displays a long upper whisker and several points beyond it. What does
this indicate?
A. Symmetric distribution
B. Left skew
C. Right skew with outliers
D. Normal distribution
Correct Answer: C. Right skew with outliers
Rationale:
A long upper tail and extreme points indicate a right-skewed distribution with
outliers.
____________________________________________________
Question 6
OBJECTIVE ASSESSMENT EXAM
ACTUAL EXAM QUESTIONS AND 100% VERIFIED
ANSWERS WITH RATIONALES GRADED A+
LATEST
Question 1
A nurse researcher summarizes systolic blood pressure values from a clinic
population. The distribution is heavily right-skewed due to several extremely high
readings. Which measure of central tendency best represents the “typical” blood
pressure?
A. Mean
B. Median
C. Mode
D. Range
Correct Answer: B. Median
Rationale:
In skewed distributions, the median is resistant to extreme values and best
represents the typical observation. The mean would be pulled upward by outliers.
,Question 2
Which Excel function would a healthcare analyst use to calculate the standard
deviation of a sample of patient cholesterol values?
A. =VAR.P()
B. =STDEV.S()
C. =AVERAGE()
D. =MEDIAN()
Correct Answer: B. =STDEV.S()
Rationale:
=STDEV.S() calculates the sample standard deviation, which is appropriate when
data represent a sample rather than an entire population.
_____________________________________________________
Question 3
A dataset shows the following values:
120, 122, 125, 130, 250
Which statement is most accurate?
,A. The mean equals the median
B. The range is small
C. There is a likely outlier
D. The distribution is symmetric
Correct Answer: C. There is a likely outlier
Rationale:
The value 250 is substantially higher than the rest, suggesting an outlier that can
distort the mean and spread.
Question 4
Which statistic best measures variability in patient length-of-stay data?
A. Mean
B. Median
C. Standard deviation
D. Mode
Correct Answer: C. Standard deviation
, Rationale:
Standard deviation quantifies how much individual values vary from the mean,
making it ideal for understanding variability.
Question 5
A boxplot displays a long upper whisker and several points beyond it. What does
this indicate?
A. Symmetric distribution
B. Left skew
C. Right skew with outliers
D. Normal distribution
Correct Answer: C. Right skew with outliers
Rationale:
A long upper tail and extreme points indicate a right-skewed distribution with
outliers.
____________________________________________________
Question 6
