1|Page
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!!)
1. A hospital quality improvement team collects the systolic blood
pressure readings of 1,500 adult patients to evaluate whether a newly
implemented hypertension management program has improved overall
patient outcomes. Before conducting additional statistical analyses, the
researchers want to calculate a single value that represents the average
blood pressure of the entire group. Which measure of central tendency
should they use if the data are approximately normally distributed and
contain no significant outliers?
A. Mean
B. Median
C. Mode
D. Range
Answer: A
Rationale: The mean is the arithmetic average and is the preferred
measure of central tendency for normally distributed numerical data
without extreme outliers.
2. A clinical researcher analyzes emergency department waiting times
and discovers that a small number of patients experienced extremely
long delays because of a natural disaster. These unusually large values
significantly affect the average waiting time. Which measure of central
,2|Page
tendency provides the best representation of the typical patient
experience in this situation?
A. Mean
B. Median
C. Variance
D. Standard deviation
Answer: B
Rationale: The median is resistant to extreme values and better
represents the center of skewed distributions.
3. A public health investigator wants to determine whether there is a
statistically significant relationship between smoking status (smoker or
non-smoker) and the occurrence of lung disease in a large patient
population. Which statistical test is generally most appropriate for
analyzing the association between these two categorical variables?
A. Chi-square test
B. Paired t-test
C. Linear regression
D. Analysis of variance (ANOVA)
Answer: A
Rationale: The Chi-square test is used to evaluate the relationship
between categorical variables.
,3|Page
4. A pharmaceutical company compares the average reduction in blood
glucose levels between two independent groups of patients receiving
different diabetes medications. The outcome variable is continuous, and
the researchers want to determine whether the difference between the
two group means is statistically significant. Which statistical test is most
appropriate?
A. Independent samples t-test
B. Chi-square test
C. Pearson correlation
D. Logistic regression
Answer: A
Rationale: An independent samples t-test compares the means of two
independent groups.
5. A healthcare researcher reports a p-value of 0.02 after comparing
patient recovery rates between two treatment groups using an
appropriate statistical test. If the significance level (α) is 0.05, what is
the correct interpretation of the result?
A. Reject the null hypothesis because the observed difference is
statistically significant.
B. Accept the null hypothesis because the p-value is greater than 0.05.
C. The treatments are guaranteed to be clinically superior.
D. The study contains no possibility of error.
Answer: A
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Rationale: Since the p-value is less than 0.05, the null hypothesis is
rejected, indicating statistical significance.
6. A nurse researcher calculates a 95% confidence interval for the
average cholesterol level among adults participating in a wellness
program. Which statement best describes the purpose of a confidence
interval?
A. It provides a range of plausible values that is likely to contain the true
population parameter.
B. It guarantees that every future observation will fall within the
interval.
C. It measures only the variability of individual patient values.
D. It replaces the need for hypothesis testing.
Answer: A
Rationale: A confidence interval estimates the range within which the
true population value is likely to fall.
7. A researcher wants to determine whether there is a linear
relationship between patients' daily exercise time and their resting
heart rate. Both variables are continuous and approximately normally
distributed. Which statistical method is most appropriate?
A. Pearson correlation coefficient
B. Chi-square test
C. Mann-Whitney U test
D. Fisher's Exact Test
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!!)
1. A hospital quality improvement team collects the systolic blood
pressure readings of 1,500 adult patients to evaluate whether a newly
implemented hypertension management program has improved overall
patient outcomes. Before conducting additional statistical analyses, the
researchers want to calculate a single value that represents the average
blood pressure of the entire group. Which measure of central tendency
should they use if the data are approximately normally distributed and
contain no significant outliers?
A. Mean
B. Median
C. Mode
D. Range
Answer: A
Rationale: The mean is the arithmetic average and is the preferred
measure of central tendency for normally distributed numerical data
without extreme outliers.
2. A clinical researcher analyzes emergency department waiting times
and discovers that a small number of patients experienced extremely
long delays because of a natural disaster. These unusually large values
significantly affect the average waiting time. Which measure of central
,2|Page
tendency provides the best representation of the typical patient
experience in this situation?
A. Mean
B. Median
C. Variance
D. Standard deviation
Answer: B
Rationale: The median is resistant to extreme values and better
represents the center of skewed distributions.
3. A public health investigator wants to determine whether there is a
statistically significant relationship between smoking status (smoker or
non-smoker) and the occurrence of lung disease in a large patient
population. Which statistical test is generally most appropriate for
analyzing the association between these two categorical variables?
A. Chi-square test
B. Paired t-test
C. Linear regression
D. Analysis of variance (ANOVA)
Answer: A
Rationale: The Chi-square test is used to evaluate the relationship
between categorical variables.
,3|Page
4. A pharmaceutical company compares the average reduction in blood
glucose levels between two independent groups of patients receiving
different diabetes medications. The outcome variable is continuous, and
the researchers want to determine whether the difference between the
two group means is statistically significant. Which statistical test is most
appropriate?
A. Independent samples t-test
B. Chi-square test
C. Pearson correlation
D. Logistic regression
Answer: A
Rationale: An independent samples t-test compares the means of two
independent groups.
5. A healthcare researcher reports a p-value of 0.02 after comparing
patient recovery rates between two treatment groups using an
appropriate statistical test. If the significance level (α) is 0.05, what is
the correct interpretation of the result?
A. Reject the null hypothesis because the observed difference is
statistically significant.
B. Accept the null hypothesis because the p-value is greater than 0.05.
C. The treatments are guaranteed to be clinically superior.
D. The study contains no possibility of error.
Answer: A
, 4|Page
Rationale: Since the p-value is less than 0.05, the null hypothesis is
rejected, indicating statistical significance.
6. A nurse researcher calculates a 95% confidence interval for the
average cholesterol level among adults participating in a wellness
program. Which statement best describes the purpose of a confidence
interval?
A. It provides a range of plausible values that is likely to contain the true
population parameter.
B. It guarantees that every future observation will fall within the
interval.
C. It measures only the variability of individual patient values.
D. It replaces the need for hypothesis testing.
Answer: A
Rationale: A confidence interval estimates the range within which the
true population value is likely to fall.
7. A researcher wants to determine whether there is a linear
relationship between patients' daily exercise time and their resting
heart rate. Both variables are continuous and approximately normally
distributed. Which statistical method is most appropriate?
A. Pearson correlation coefficient
B. Chi-square test
C. Mann-Whitney U test
D. Fisher's Exact Test
