WGU C784 APPLIED HEALTHCARE STATISTICS
OBJECTIVE ASSESSMENT #1 EXAM 2026
UPDATED | FULLY SOLVED VERIFIED ANSWERS |
LATEST STUDY GUIDE
• This is a fully solved, verified 200-question practice exam for WGU C784 Applied
Healthcare Statistics, designed to mirror the format and rigor of the actual
Objective Assessment.
• Use this material by reading each question carefully, attempting your answer
before checking the highlighted correct option and EXPERT RATIONALE below it.
QUESTION 1 Which level of measurement classifies data into categories with
no natural order?
A) Ratio
B) Interval
C) Ordinal
D) Continuous
E) Nominal
Correct Answer: E) Nominal EXPERT RATIONALE: Nominal data categorizes
without any ranking or order, such as blood type or gender.
QUESTION 2 Which measure of central tendency is most affected by extreme
outliers?
A) Mode
B) Median
C) Range
D) Midrange
E) Mean
, Correct Answer: E) Mean EXPERT RATIONALE: The mean uses all values in its
calculation, so extreme values (outliers) pull it significantly in one direction.
QUESTION 3 A dataset has values: 4, 8, 8, 10, 15. What is the median?
A) 8.5
B) 9
C) 10
D) 7.5
E) 8
Correct Answer: E) 8 EXPERT RATIONALE: When arranged in order, the middle
value of five data points is the third one, which is 8.
QUESTION 4 Which type of variable can take any value within a range?
A) Nominal
B) Discrete
C) Ordinal
D) Categorical
E) Continuous
Correct Answer: E) Continuous EXPERT RATIONALE: Continuous variables can
take any value within a range, such as height, weight, or blood pressure.
QUESTION 5 What does a p-value of 0.03 indicate when the significance level is
0.05?
A) Fail to reject the null hypothesis
B) The result is not significant
,C) There is a 3% chance the alternative is true
D) The null hypothesis is proven true
E) Reject the null hypothesis
Correct Answer: E) Reject the null hypothesis EXPERT RATIONALE: Since 0.03 <
0.05, the result is statistically significant and we reject the null hypothesis.
QUESTION 6 Which graph is most appropriate for displaying the frequency
distribution of continuous data?
A) Bar chart
B) Pie chart
C) Scatter plot
D) Line graph
E) Histogram
Correct Answer: E) Histogram EXPERT RATIONALE: Histograms display the
distribution of continuous data by grouping values into intervals (bins).
QUESTION 7 What is the variance if the standard deviation is 6?
A) 3
B) 2.45
C) 12
D) 18
E) 36
Correct Answer: E) 36 EXPERT RATIONALE: Variance is the square of the
standard deviation. 6² = 36.
, QUESTION 8 Which sampling method gives every member of the population
an equal chance of being selected?
A) Stratified sampling
B) Cluster sampling
C) Convenience sampling
D) Purposive sampling
E) Simple random sampling
Correct Answer: E) Simple random sampling EXPERT RATIONALE: In simple
random sampling, each individual has an equal and independent chance of being
selected.
QUESTION 9 Which statistical test is used to compare means of two
independent groups?
A) Chi-square test
B) Paired t-test
C) ANOVA
D) Pearson correlation
E) Independent samples t-test
Correct Answer: E) Independent samples t-test EXPERT RATIONALE: The
independent samples t-test compares means from two separate, unrelated groups.
QUESTION 10 A correlation coefficient of -0.85 indicates:
A) No relationship
B) A weak positive relationship
C) A moderate negative relationship
OBJECTIVE ASSESSMENT #1 EXAM 2026
UPDATED | FULLY SOLVED VERIFIED ANSWERS |
LATEST STUDY GUIDE
• This is a fully solved, verified 200-question practice exam for WGU C784 Applied
Healthcare Statistics, designed to mirror the format and rigor of the actual
Objective Assessment.
• Use this material by reading each question carefully, attempting your answer
before checking the highlighted correct option and EXPERT RATIONALE below it.
QUESTION 1 Which level of measurement classifies data into categories with
no natural order?
A) Ratio
B) Interval
C) Ordinal
D) Continuous
E) Nominal
Correct Answer: E) Nominal EXPERT RATIONALE: Nominal data categorizes
without any ranking or order, such as blood type or gender.
QUESTION 2 Which measure of central tendency is most affected by extreme
outliers?
A) Mode
B) Median
C) Range
D) Midrange
E) Mean
, Correct Answer: E) Mean EXPERT RATIONALE: The mean uses all values in its
calculation, so extreme values (outliers) pull it significantly in one direction.
QUESTION 3 A dataset has values: 4, 8, 8, 10, 15. What is the median?
A) 8.5
B) 9
C) 10
D) 7.5
E) 8
Correct Answer: E) 8 EXPERT RATIONALE: When arranged in order, the middle
value of five data points is the third one, which is 8.
QUESTION 4 Which type of variable can take any value within a range?
A) Nominal
B) Discrete
C) Ordinal
D) Categorical
E) Continuous
Correct Answer: E) Continuous EXPERT RATIONALE: Continuous variables can
take any value within a range, such as height, weight, or blood pressure.
QUESTION 5 What does a p-value of 0.03 indicate when the significance level is
0.05?
A) Fail to reject the null hypothesis
B) The result is not significant
,C) There is a 3% chance the alternative is true
D) The null hypothesis is proven true
E) Reject the null hypothesis
Correct Answer: E) Reject the null hypothesis EXPERT RATIONALE: Since 0.03 <
0.05, the result is statistically significant and we reject the null hypothesis.
QUESTION 6 Which graph is most appropriate for displaying the frequency
distribution of continuous data?
A) Bar chart
B) Pie chart
C) Scatter plot
D) Line graph
E) Histogram
Correct Answer: E) Histogram EXPERT RATIONALE: Histograms display the
distribution of continuous data by grouping values into intervals (bins).
QUESTION 7 What is the variance if the standard deviation is 6?
A) 3
B) 2.45
C) 12
D) 18
E) 36
Correct Answer: E) 36 EXPERT RATIONALE: Variance is the square of the
standard deviation. 6² = 36.
, QUESTION 8 Which sampling method gives every member of the population
an equal chance of being selected?
A) Stratified sampling
B) Cluster sampling
C) Convenience sampling
D) Purposive sampling
E) Simple random sampling
Correct Answer: E) Simple random sampling EXPERT RATIONALE: In simple
random sampling, each individual has an equal and independent chance of being
selected.
QUESTION 9 Which statistical test is used to compare means of two
independent groups?
A) Chi-square test
B) Paired t-test
C) ANOVA
D) Pearson correlation
E) Independent samples t-test
Correct Answer: E) Independent samples t-test EXPERT RATIONALE: The
independent samples t-test compares means from two separate, unrelated groups.
QUESTION 10 A correlation coefficient of -0.85 indicates:
A) No relationship
B) A weak positive relationship
C) A moderate negative relationship
