1. Multiple Choice: Which test would be most appropriate for determining if there is a significant difference in the mean annual incomes between two different regions? A) One-sample t-test B) Two-sample t-test C) Paired t-test D) Chi-square test Answer: B) Two-sample t-test Rationale: A two-sample t-test is used to compare the means from two separate groups, which is suitable for comparing incomes between two regions. 2. Fill-in-the-Blank: When comparing more than two means, the appropriate statistical test to use is __________. Answer: ANOVA (Analysis of Variance) Rationale: ANOVA is used to determine if there are any statistically significant differences between the means of three or more independent groups.