WGU C784 MATH 1100 Applied Healthcare Statistics OA READINESS GUIDE Q & S 2026/2027

WGU C784 MATH 1100 Applied Healthcare Statistics OA READINESS GUIDE Q & S 2026/2027

1. Which of the following is an essential characteristic of a
well-designed clinical trial?
 - A. Randomization
 - B. Bias
 - C. Small Sample Size
 - D. Convenience Sampling
 Answer: A. Randomization
 Rationale: Randomization minimizes bias and ensures
that the treatment and control groups are comparable.
2. In a study measuring systolic blood pressure reduction
after treatment, the mean and standard deviation are
reported as 120 mmHg (± 15). What is the amount of
variability in blood pressure reduction?
 - A. 120 mmHg
 - B. 15 mmHg
 - C. 180 mmHg
 - D. 135 mmHg
 Answer: B. 15 mmHg
 Rationale: The standard deviation (± 15) indicates the
variability or spread of the data around the mean.
3. Which of the following statistical tests is appropriate for
comparing the means of two independent groups?
 - A. Paired t-test
 - B. ANOVA
 - C. Independent t-test
 - D. Chi-square test
 Answer: C. Independent t-test
 Rationale: The independent t-test is designed to
compare the means of two unrelated groups.