WGUC784–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 (Correct)
· C. Mode
· D. Range
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.PO
· B. =STDEV.SO (Correct)
· C. =AVERAGE()
· D. =MEDIAN()
Rationale:
=STDEV.SO 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 (Correct)
· D. The distribution is symmetric
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 (Correct)
· D. Mode
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 (Correct)
· D. Normal distribution
Rationale: A long upper tail and extreme points indicate a right-skewed
distribution with outliers.
Question 6
Which graph is most appropriate for comparing infection rates across
multiple hospital units?
· A. Histogram
· B. Boxplot
· C. Bar chart (Correct)
· D. Scatterplot
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 (Correct)
· C. Mode
· D. Range
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.PO
· B. =STDEV.SO (Correct)
· C. =AVERAGE()
· D. =MEDIAN()
Rationale:
=STDEV.SO 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 (Correct)
· D. The distribution is symmetric
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 (Correct)
· D. Mode
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 (Correct)
· D. Normal distribution
Rationale: A long upper tail and extreme points indicate a right-skewed
distribution with outliers.
Question 6
Which graph is most appropriate for comparing infection rates across
multiple hospital units?
· A. Histogram
· B. Boxplot
· C. Bar chart (Correct)
· D. Scatterplot
