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(LU) HLTH 501 Biostatistics Complete Final Exam Review . $13.49   Add to cart

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(LU) HLTH 501 Biostatistics Complete Final Exam Review .

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(LU) HLTH 501 Biostatistics Complete Final Exam Review .(LU) HLTH 501 Biostatistics Complete Final Exam Review .(LU) HLTH 501 Biostatistics Complete Final Exam Review .(LU) HLTH 501 Biostatistics Complete Final Exam Review .

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  • August 20, 2024
  • 31
  • 2024/2025
  • Exam (elaborations)
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ClemAcademia
HLTH 501




Biostatistics




COMPLETE FINAL EXAM
REVIEW




© 2024/2025

,1. Multiple Choice: Which statistical test would be most
appropriate for comparing the mean blood pressure levels between
two independent groups with normal distribution?
a) Chi-square test
b) T-test
c) ANOVA
d) Regression analysis
Answer: b) T-test
Rationale: The T-test is used to compare the means of two
independent groups when the data is normally distributed.


2. Fill-in-the-Blank: The ________ is a measure of the strength and
direction of the relationship between two variables.
Answer: Correlation coefficient
Rationale: The correlation coefficient quantifies the degree to
which two variables are related.


3. True/False: The p-value can inform us about the magnitude of
the effect of our intervention.
Answer: False



© 2024/2025

, Rationale: The p-value indicates the probability of obtaining the
observed results, or more extreme, by chance if the null hypothesis
is true. It does not measure the effect size.


4. Multiple Response: Which of the following are assumptions of
linear regression? (Select all that apply)
a) Homoscedasticity
b) Independence of errors
c) Normal distribution of errors
d) Equal sample sizes
Answers: a) Homoscedasticity, b) Independence of errors, c)
Normal distribution of errors
Rationale: These are key assumptions for linear regression
analysis; equal sample sizes are not a requirement.


5. Multiple Choice: In survival analysis, the function that defines
the probability of an event occurring at time t is known as:
a) Risk function
b) Hazard function
c) Survival function
d) Density function
Answer: b) Hazard function

© 2024/2025

, Rationale: The hazard function specifies the instant risk for the
event to occur at a certain time.


6. Fill-in-the-Blank: In a clinical trial, the difference in effectiveness
between a new medication and a standard treatment is known as
the ________.
Answer: Treatment effect
Rationale: The treatment effect refers to the impact of the
intervention being tested in the trial.


7. True/False: A Kaplan-Meier curve is used to estimate the
median survival time of a cohort.
Answer: True
Rationale: The Kaplan-Meier curve is a non-parametric statistic
used to estimate the survival function from lifetime data.


8. Multiple Response: Which of the following are components of a
Cox proportional hazards model? (Select all that apply)
a) Baseline hazard function
b) Covariates
c) Interaction terms
d) Residuals


© 2024/2025

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