Fall Semester 2025–2026 | WGU C784 Applied Healthcare
Statistics Complete Study Guide with 340 Practice Questions |
Updated 2025–2026 WGU C784 Healthcare Analytics Review,
Quantitative & Qualitative Methods, Data Interpretation,
Statistical Analysis, Leadership Decision-Making & High-
Yield Exam Prep Notes
Question 1:
What is the primary purpose of descriptive statistics in healthcare?
• A) To make predictions about future outcomes
• B) To organize and summarize data
• C) To test hypotheses
• D) To determine causality
CORRECT ANSWER: B
Rationale: Descriptive statistics aim to summarize and organize data for better
understanding, making it easier to interpret healthcare trends and patterns.
Question 2:
Which of the following measures of central tendency is affected by extreme values?
• A) Mean
• B) Median
• C) Mode
• D) Range
CORRECT ANSWER: A
Rationale: The mean is sensitive to extreme values (outliers) as it is calculated by
summing all values and dividing by the number of values.
Question 3:
What type of data is measured in category labels without a specific order?
• A) Ordinal data
• B) Nominal data
• C) Interval data
• D) Ratio data
CORRECT ANSWER: B
Rationale: Nominal data consists of categories that do not have a meaningful order,
such as gender or blood type.
,Question 4:
In hypothesis testing, what is the null hypothesis typically denoted as?
• A) H1
• B) H0
• C) Ha
• D) Hx
CORRECT ANSWER: B
Rationale: The null hypothesis is commonly denoted as H0, representing the default
position that there is no effect or no difference.
Question 5:
What does a p-value lower than 0.05 generally indicate in a statistical test?
• A) Strong evidence against the null hypothesis
• B) Weak evidence against the null hypothesis
• C) No relationship between variables
• D) Perfect correlation
CORRECT ANSWER: A
Rationale: A p-value less than 0.05 suggests strong evidence against the null
hypothesis, leading to its rejection in favor of the alternative hypothesis.
Question 6:
Which statistical method is used to analyze the relationship between two continuous
variables?
• A) Chi-square test
• B) Linear regression
• C) T-test
• D) ANOVA
CORRECT ANSWER: B
Rationale: Linear regression assesses the relationship between two continuous
variables by fitting a line to the data points.
Question 7:
What term is used to describe the spread of data points around the mean?
• A) Variance
, • B) Frequency
• C) Median
• D) Mode
CORRECT ANSWER: A
Rationale: Variance measures how far each data point in the set is from the mean,
indicating the data's spread.
Question 8:
Which of the following is not a type of sampling method?
• A) Random sampling
• B) Stratified sampling
• C) Systematic sampling
• D) Analytical sampling
CORRECT ANSWER: D
Rationale: Analytical sampling is not a recognized sampling method in statistics; the
other three are valid techniques for selecting samples.
Question 9:
What is the main purpose of using control charts in healthcare quality improvement?
• A) To display individual data points
• B) To monitor processes over time
• C) To establish causal relationships
• D) To predict future trends
CORRECT ANSWER: B
Rationale: Control charts are used to monitor processes over time, helping identify
variations that may need attention.
Question 10:
What does a 95% confidence interval indicate?
• A) There is a 95% chance that the interval contains the population parameter
• B) The sample mean will always fall within this interval
• C) The interval contains all possible sample means
, • D) There is a 5% chance that the null hypothesis is correct
CORRECT ANSWER: A
Rationale: A 95% confidence interval suggests that we can be 95% confident that the
interval contains the true population parameter.
Question 11:
Which statistical test is most appropriate for comparing means among three or more
groups?
• A) T-test
• B) ANOVA
• C) Chi-square test
• D) Mann-Whitney test
CORRECT ANSWER: B
Rationale: ANOVA (Analysis of Variance) is designed to compare means across three or
more groups.
Question 12:
What is the range of a data set?
• A) The difference between the highest and lowest values
• B) The average of all data points
• C) The most frequently occurring value
• D) The sum of all data points
CORRECT ANSWER: A
Rationale: The range is calculated as the difference between the highest and lowest
values in the data set.
Question 13:
Which of the following is a characteristic of a normal distribution?
• A) Skewed to the right
• B) Bell-shaped curve
• C) Peak at both ends
• D) Multiple peaks
Statistics Complete Study Guide with 340 Practice Questions |
Updated 2025–2026 WGU C784 Healthcare Analytics Review,
Quantitative & Qualitative Methods, Data Interpretation,
Statistical Analysis, Leadership Decision-Making & High-
Yield Exam Prep Notes
Question 1:
What is the primary purpose of descriptive statistics in healthcare?
• A) To make predictions about future outcomes
• B) To organize and summarize data
• C) To test hypotheses
• D) To determine causality
CORRECT ANSWER: B
Rationale: Descriptive statistics aim to summarize and organize data for better
understanding, making it easier to interpret healthcare trends and patterns.
Question 2:
Which of the following measures of central tendency is affected by extreme values?
• A) Mean
• B) Median
• C) Mode
• D) Range
CORRECT ANSWER: A
Rationale: The mean is sensitive to extreme values (outliers) as it is calculated by
summing all values and dividing by the number of values.
Question 3:
What type of data is measured in category labels without a specific order?
• A) Ordinal data
• B) Nominal data
• C) Interval data
• D) Ratio data
CORRECT ANSWER: B
Rationale: Nominal data consists of categories that do not have a meaningful order,
such as gender or blood type.
,Question 4:
In hypothesis testing, what is the null hypothesis typically denoted as?
• A) H1
• B) H0
• C) Ha
• D) Hx
CORRECT ANSWER: B
Rationale: The null hypothesis is commonly denoted as H0, representing the default
position that there is no effect or no difference.
Question 5:
What does a p-value lower than 0.05 generally indicate in a statistical test?
• A) Strong evidence against the null hypothesis
• B) Weak evidence against the null hypothesis
• C) No relationship between variables
• D) Perfect correlation
CORRECT ANSWER: A
Rationale: A p-value less than 0.05 suggests strong evidence against the null
hypothesis, leading to its rejection in favor of the alternative hypothesis.
Question 6:
Which statistical method is used to analyze the relationship between two continuous
variables?
• A) Chi-square test
• B) Linear regression
• C) T-test
• D) ANOVA
CORRECT ANSWER: B
Rationale: Linear regression assesses the relationship between two continuous
variables by fitting a line to the data points.
Question 7:
What term is used to describe the spread of data points around the mean?
• A) Variance
, • B) Frequency
• C) Median
• D) Mode
CORRECT ANSWER: A
Rationale: Variance measures how far each data point in the set is from the mean,
indicating the data's spread.
Question 8:
Which of the following is not a type of sampling method?
• A) Random sampling
• B) Stratified sampling
• C) Systematic sampling
• D) Analytical sampling
CORRECT ANSWER: D
Rationale: Analytical sampling is not a recognized sampling method in statistics; the
other three are valid techniques for selecting samples.
Question 9:
What is the main purpose of using control charts in healthcare quality improvement?
• A) To display individual data points
• B) To monitor processes over time
• C) To establish causal relationships
• D) To predict future trends
CORRECT ANSWER: B
Rationale: Control charts are used to monitor processes over time, helping identify
variations that may need attention.
Question 10:
What does a 95% confidence interval indicate?
• A) There is a 95% chance that the interval contains the population parameter
• B) The sample mean will always fall within this interval
• C) The interval contains all possible sample means
, • D) There is a 5% chance that the null hypothesis is correct
CORRECT ANSWER: A
Rationale: A 95% confidence interval suggests that we can be 95% confident that the
interval contains the true population parameter.
Question 11:
Which statistical test is most appropriate for comparing means among three or more
groups?
• A) T-test
• B) ANOVA
• C) Chi-square test
• D) Mann-Whitney test
CORRECT ANSWER: B
Rationale: ANOVA (Analysis of Variance) is designed to compare means across three or
more groups.
Question 12:
What is the range of a data set?
• A) The difference between the highest and lowest values
• B) The average of all data points
• C) The most frequently occurring value
• D) The sum of all data points
CORRECT ANSWER: A
Rationale: The range is calculated as the difference between the highest and lowest
values in the data set.
Question 13:
Which of the following is a characteristic of a normal distribution?
• A) Skewed to the right
• B) Bell-shaped curve
• C) Peak at both ends
• D) Multiple peaks
