WGU C784 MATH 1100 Applied Healthcare Statistics FA READINESS GUIDE Q & S 2025/2026

1. What is the purpose of using stratified sampling in
healthcare research?
 - A) To increase sample size
 - B) To ensure that subgroups are adequately
represented
 - C) To simplify analysis
 - D) To ensure randomness
 - Correct Answer: B
 - Rationale: Stratified sampling ensures that different
subgroups (strata) in the population are represented in the
sample, thus enhancing the generalizability of the findings.
2. In a normally distributed dataset, what percentage of
data falls within one standard deviation of the mean?
 - A) 50%
 - B) 68%
 - C) 95%
 - D) 99%
 - Correct Answer: B
 - Rationale: Approximately 68% of the data in a normal
distribution falls within one standard deviation of the mean.
3. Which of the following statistical tests would be most
appropriate for comparing the means of two related groups?
 - A) Independent t-test
 - B) ANOVA
 - C) Paired t-test
 - D) Chi-square test
 - Correct Answer: C
 - Rationale: A paired t-test is used to compare the
means of two related groups, such as measurements taken
before and after an intervention on the same subjects.