(WGU D784) MATH 1100 Applied Healthcare Statistics - OA Readiness Guide Q & S 2024(WGU D784) MATH 1100 Applied Healthcare Statistics - OA Readiness Guide Q & S 2024(WGU D784) MATH 1100 Applied Healthcare Statistics - OA Readiness Guide Q & S 2024
,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.
, 4. What does a p-value of 0.05 signify in hypothesis
testing?
- A. The null hypothesis is true.
- B. There is a 5% chance the null hypothesis is correct.
- C. There is a 95% chance the results are not due to
random chance.
- D. The results are statistically significant.
Answer: D. The results are statistically significant.
Rationale: A p-value of 0.05 indicates that there is a
statistically significant difference, with a 5% chance of
erroneously rejecting the null hypothesis.
5. In a Kaplan-Meier survival analysis, what does the term
'censoring' refer to?
- A. The elimination of outliers
- B. The inclusion of patients who dropped out
- C. The removal of incomplete data
- D. The situation where the outcome event has not
occurred by the end of the study
Answer: D. The situation where the outcome event has
not occurred by the end of the study
Rationale: Censoring occurs when the event of interest
has not been observed for a participant by the end of the
study period.
### Fill-in-the-Blank Questions
6. The __________ is a measure of the central tendency
that is affected by extreme values in a dataset.
Answer: mean
Rationale: The mean can be skewed by outliers,
making it less representative of the data as a whole.
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller emiliophd. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
