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

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.

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jordancarter 7 months ago

This study guide is clear, well-organized, and covers all the essential topics. The explanations are concise, making complex concepts easier to understand. It could benefit from more practice questions, but overall, it's a great resource for efficient studying. Highly recommend!

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