1. Which of the following statistical tests would

be most appropriate to compare the mean blood

pressure levels of patients before and after a new

medication intervention?

A) Independent samples t-test

B) Paired samples t-test

C) Chi-square test

D) Analysis of Variance (ANOVA)

Answer: B) Paired samples t-test

Rationale: A paired samples t-test is used when

comparing the means of two related groups, such

as before and after measurements within the same

group.

2. In a study examining the relationship between

smoking status and lung cancer incidence, which

statistical analysis would be most appropriate?

A) Pearson correlation

B) Linear regression

C) Chi-square test

D) Independent samples t-test

Answer: C) Chi-square test

Rationale: A chi-square test is used to assess the

association between two categorical variables,

such as smoking status and lung cancer incidence.

3. A researcher is interested in determining if there

is a difference in pain scores among patient