,1. Multiple Choice: Which statistical test is most appropriate for
comparing the means of two independent groups?
a) Chi-square test
b) T-test
c) ANOVA
d) Regression analysis
Answer: b) T-test
Rationale: The T-test is designed to compare the means of two
groups and determine if they are statistically different from each
other.
2. Fill-in-the-Blank: The _______ is a measure of the relationship
between two variables and ranges from -1 to 1.
Answer: Correlation coefficient
Rationale: The correlation coefficient measures the strength and
direction of a linear relationship between two variables.
3. True/False: P-values can determine the cause of an effect.
Answer: False
Rationale: P-values can only suggest whether an observed effect is
statistically significant, not the cause of it.
, 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 variables
d) Linearity of the relationship between variables
Answers: a) Homoscedasticity, b) Independence of errors, d)
Linearity of the relationship between variables
Rationale: These are key assumptions for linear regression
analysis to provide valid results.
5. Multiple Choice: In healthcare research, what does a Kaplan-
Meier curve estimate?
a) Patient survival rates
b) Hospital readmission rates
c) Incidence of disease
d) Prevalence of disease
Answer: a) Patient survival rates
Rationale: The Kaplan-Meier curve is a statistical tool used to
estimate the survival function from lifetime data.
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